chore: release v0.1.0.41

Maschinenstunden sind im Journal erfassbar; der Kraftstoffverbrauch pro Maschinenstunde wird aus Tagesverbrauch und Maschinenstunden berechnet und in Journal sowie Statistik als Read-only angezeigt.

Co-authored-by: Cursor <cursoragent@cursor.com>

VERSION

@@ -1 +1 @@
-0.1.0.38
+0.1.0.42

client/src/App.css

@@ -63,6 +63,16 @@ body {
   margin-bottom: 15px;
 }
 
+.auth-brand-title-row {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  justify-content: center;
+  gap: 10px;
+  margin-bottom: 14px;
+}
+
+.auth-brand-title-row h1,
 .auth-brand h1 {
   font-size: 32px;
   font-weight: 700;
@@ -71,7 +81,7 @@ body {
   -webkit-background-clip: text;
   background-clip: text;
   -webkit-text-fill-color: transparent;
-  margin: 0 0 14px 0;
+  margin: 0;
   line-height: 1.25;
   letter-spacing: -0.5px;
 }
@@ -895,6 +905,36 @@ html.scheme-dark .themed-select-option.is-selected {
   color: var(--app-text-heading);
 }
 
+.section-toolbar {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+  align-items: center;
+}
+
+.copy-link-row {
+  display: flex;
+  gap: 8px;
+  align-items: center;
+  width: 100%;
+  min-width: 0;
+}
+
+.copy-link-row .input-text {
+  flex: 1;
+  min-width: 0;
+}
+
+.form-actions--start {
+  justify-content: flex-start;
+}
+
+.table-responsive {
+  width: 100%;
+  overflow-x: auto;
+  -webkit-overflow-scrolling: touch;
+}
+
 .btn-refresh {
   background: none;
   border: none;
@@ -1635,6 +1675,224 @@ html.scheme-dark .themed-select-option.is-selected {
   .hide-mobile {
     display: none !important;
   }
+
+  .dashboard-header,
+  .app-header {
+    flex-wrap: wrap;
+    align-items: flex-start;
+    gap: 12px;
+  }
+
+  .app-header-left {
+    flex: 1 1 100%;
+    min-width: 0;
+    align-items: flex-start;
+    gap: 10px;
+  }
+
+  .app-title-area {
+    min-width: 0;
+    flex: 1;
+  }
+
+  .app-title-area h2 {
+    font-size: 17px;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+    max-width: 100%;
+  }
+
+  .app-title-row {
+    gap: 6px;
+  }
+
+  .app-subtitle {
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+  }
+
+  .header-brand {
+    flex: 1 1 auto;
+    min-width: 0;
+  }
+
+  .header-brand h1 {
+    font-size: 20px;
+  }
+
+  .header-actions {
+    flex: 1 1 100%;
+    flex-wrap: wrap;
+    justify-content: flex-end;
+    gap: 8px;
+  }
+
+  .conn-status > span:not(.pulse-dot) {
+    display: none;
+  }
+
+  .skipper-badge__name {
+    display: none;
+  }
+
+  .btn-back {
+    padding: 8px 10px;
+    flex-shrink: 0;
+  }
+
+  .section-title-bar {
+    flex-direction: column;
+    align-items: stretch;
+    gap: 12px;
+  }
+
+  .section-toolbar {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 8px;
+    width: 100%;
+  }
+
+  .section-toolbar .btn {
+    flex: 1 1 auto;
+    min-width: 0;
+  }
+
+  .section-toolbar .btn.primary {
+    flex: 1 1 100%;
+  }
+
+  .section-title-left {
+    flex-direction: column;
+    align-items: stretch;
+    gap: 10px;
+  }
+
+  .section-title-left .form-header h2 {
+    font-size: 16px;
+    white-space: normal;
+    word-break: break-word;
+  }
+
+  .logbooks-grid {
+    grid-template-columns: 1fr;
+    gap: 16px;
+  }
+
+  .logbook-card {
+    flex-wrap: wrap;
+    padding: 16px;
+    gap: 12px;
+  }
+
+  .card-meta {
+    flex-wrap: wrap;
+  }
+
+  .card-info h3 {
+    white-space: normal;
+    word-break: break-word;
+  }
+
+  .editor-header {
+    flex-wrap: wrap;
+    gap: 10px;
+  }
+
+  .crew-grid {
+    grid-template-columns: 1fr;
+  }
+
+  .copy-link-row {
+    flex-direction: column;
+    align-items: stretch;
+  }
+
+  .copy-link-row .btn {
+    width: 100%;
+  }
+
+  .form-actions--start {
+    flex-direction: column;
+    align-items: stretch;
+  }
+
+  .form-actions--start .btn {
+    width: 100%;
+  }
+
+  .table-responsive {
+    width: 100%;
+    overflow-x: auto;
+    -webkit-overflow-scrolling: touch;
+  }
+
+  .table-responsive table {
+    min-width: 480px;
+  }
+
+  .custom-dialog-overlay {
+    padding: max(16px, env(safe-area-inset-left)) max(16px, env(safe-area-inset-right));
+    align-items: flex-end;
+  }
+
+  .custom-dialog-card {
+    width: 100%;
+    max-width: none;
+    padding: 22px 18px;
+    margin-bottom: env(safe-area-inset-bottom, 0px);
+  }
+
+  .custom-dialog-actions {
+    flex-direction: column-reverse;
+    gap: 10px;
+  }
+
+  .custom-dialog-actions .btn {
+    width: 100%;
+    margin: 0 !important;
+  }
+
+  .disclaimer-modal-overlay {
+    padding: max(12px, env(safe-area-inset-left)) max(12px, env(safe-area-inset-right));
+    align-items: flex-end;
+  }
+
+  .disclaimer-modal-panel,
+  .registration-disclaimer--modal {
+    width: 100%;
+    max-width: none;
+  }
+
+  .auth-card {
+    padding: 28px 20px;
+    max-width: calc(100vw - 24px);
+  }
+
+  .app-layout,
+  .dashboard-container {
+    padding-bottom: calc(56px + env(safe-area-inset-bottom, 0px));
+  }
+
+  .track-info-left {
+    flex-wrap: wrap;
+  }
+
+  .track-actions {
+    width: 100%;
+  }
+
+  .track-actions .btn {
+    flex: 1 1 calc(50% - 4px);
+    justify-content: center;
+  }
+
+  #openseamap-container,
+  .track-map-container {
+    height: min(360px, 45svh);
+  }
 }
 
 /* ========================================== */
@@ -2257,6 +2515,12 @@ html.theme-cupertino .events-scroll-container {
   color: #94a3b8;
 }
 
+.track-actions {
+  display: flex;
+  gap: 8px;
+  flex-wrap: wrap;
+}
+
 .track-error-msg {
   color: #ef4444;
   background: rgba(239, 68, 68, 0.1);
@@ -2396,6 +2660,13 @@ html.theme-cupertino .events-scroll-container {
   color: var(--app-text-muted);
 }
 
+.stats-section-subtitle {
+  margin: 0 0 12px;
+  font-size: 14px;
+  font-weight: 600;
+  color: var(--app-text-primary);
+}
+
 .stats-route-chain {
   margin: 0;
   font-size: 15px;
@@ -2498,6 +2769,14 @@ html.theme-cupertino .events-scroll-container {
   background: linear-gradient(180deg, #38bdf8, #0284c7);
 }
 
+.stats-bar--motor-hours {
+  background: linear-gradient(180deg, #a78bfa, #7c3aed);
+}
+
+.stats-bar--fuel-per-hour {
+  background: linear-gradient(180deg, #fb923c, #ea580c);
+}
+
 .stats-bar-label {
   margin-top: 8px;
   font-size: 11px;
@@ -3191,6 +3470,28 @@ html.theme-cupertino .events-scroll-container {
   border: 1px solid rgba(251, 191, 36, 0.25);
 }
 
+.beta-badge {
+  display: inline-flex;
+  align-items: center;
+  padding: 2px 8px;
+  border-radius: 999px;
+  font-size: 11px;
+  font-weight: 600;
+  letter-spacing: 0.04em;
+  text-transform: uppercase;
+  color: var(--app-accent-light);
+  background: var(--app-accent-bg);
+  border: 1px solid var(--app-accent-focus-ring);
+  flex-shrink: 0;
+}
+
+.header-brand-title-row {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 10px;
+}
+
 .role-badge {
   display: inline-flex;
   align-items: center;
@@ -3320,7 +3621,9 @@ body.app-tour-active .app-tour-target-active {
 .app-tour-tooltip {
   position: fixed;
   z-index: 10002;
+  box-sizing: border-box;
   width: min(420px, calc(100vw - 32px));
+  max-width: calc(100vw - 32px);
   padding: 20px 20px 16px;
   border-radius: 16px;
   background: #1e293b;
@@ -3329,10 +3632,19 @@ body.app-tour-active .app-tour-target-active {
   pointer-events: auto;
 }
 
+.app-tour-tooltip:not(.centered) {
+  left: max(16px, env(safe-area-inset-left, 0px));
+  right: max(16px, env(safe-area-inset-right, 0px));
+  width: auto;
+  max-width: none;
+}
+
 .app-tour-tooltip.centered {
   top: 50%;
   left: 50%;
   transform: translate(-50%, -50%);
+  width: min(420px, calc(100vw - 32px - env(safe-area-inset-left, 0px) - env(safe-area-inset-right, 0px)));
+  max-width: calc(100vw - 32px - env(safe-area-inset-left, 0px) - env(safe-area-inset-right, 0px));
 }
 
 .app-tour-close {
@@ -3409,6 +3721,34 @@ body.app-tour-active .app-tour-target-active {
   display: inline-flex;
   align-items: center;
   gap: 6px;
+  flex-shrink: 0;
+}
+
+@media (max-width: 520px) {
+  .app-tour-tooltip {
+    padding: 18px 16px 14px;
+  }
+
+  .app-tour-actions {
+    flex-direction: column;
+    align-items: stretch;
+    gap: 10px;
+  }
+
+  .app-tour-nav {
+    margin-left: 0;
+    width: 100%;
+  }
+
+  .app-tour-nav-btn {
+    flex: 1;
+    justify-content: center;
+    min-width: 0;
+  }
+}
+
+body.app-tour-active .pwa-install-banner {
+  display: none !important;
 }
 
 body.app-tour-active .disclaimer-modal-overlay.feedback-modal-overlay--tour {

client/src/App.tsx

@@ -13,6 +13,7 @@ import SettingsForm from './components/SettingsForm.tsx'
 import InvitationAcceptance from './components/InvitationAcceptance.tsx'
 import AppTourOverlay from './components/AppTourOverlay.tsx'
 import { AppTourProvider, useAppTour, type AppTab } from './context/AppTourContext.tsx'
+import { UnsavedChangesProvider, useUnsavedChangesContext } from './context/UnsavedChangesContext.tsx'
 import { getActiveMasterKey, logoutUser, checkServerSession } from './services/auth.js'
 import { PlausibleEvents, trackPlausibleEvent } from './services/analytics.js'
 import {
@@ -28,6 +29,7 @@ import PwaInstallPrompt from './components/PwaInstallPrompt.tsx'
 import PwaUpdatePrompt from './components/PwaUpdatePrompt.tsx'
 import AppFooter from './components/AppFooter.tsx'
 import LogbookRoleBadge from './components/LogbookRoleBadge.tsx'
+import BetaBadge from './components/BetaBadge.tsx'
 import { db } from './services/db.js'
 import { getLogbookAccess } from './services/logbookAccess.js'
 import type { LogbookAccessRole } from './services/logbook.js'
@@ -47,6 +49,7 @@ const PENDING_PUSH_LOGBOOK_KEY = 'pending_push_logbook_id'
 
 function App() {
   const { t, i18n } = useTranslation()
+  const { confirmLeave } = useUnsavedChangesContext()
   const { registerNavigation, requestStartAfterLogin, isActive, currentStepId } = useAppTour()
   const [isAuthenticated, setIsAuthenticated] = useState(false)
   const [activeLogbookId, setActiveLogbookId] = useState<string | null>(null)
@@ -346,7 +349,14 @@ function App() {
     consumePendingPushLogbook()
   }
 
-  const handleLogout = () => {
+  const handleTabChange = async (tab: AppTab) => {
+    if (tab === activeTab) return
+    if (!(await confirmLeave())) return
+    setActiveTab(tab)
+  }
+
+  const handleLogout = async () => {
+    if (!(await confirmLeave())) return
     void logoutUser()
     setIsAuthenticated(false)
     setActiveLogbookId(null)
@@ -357,7 +367,8 @@ function App() {
     localStorage.removeItem('active_logbook_title')
   }
 
-  const handleBackToDashboard = () => {
+  const handleBackToDashboard = async () => {
+    if (!(await confirmLeave())) return
     setActiveLogbookId(null)
     setActiveLogbookTitle(null)
     setTourSelectedEntryId(null)
@@ -420,10 +431,12 @@ function App() {
     )
   }
 
-  const pwaInstallBanner = <PwaInstallPrompt variant="banner" />
+  const pwaInstallBanner = !isActive ? <PwaInstallPrompt variant="banner" /> : null
 
   const logbookReadOnly =
     activeLogbookRecord?.isShared === 1 && activeAccessRole === 'READ'
+  const isLogbookOwner =
+    activeAccessRole === 'OWNER' || activeLogbookRecord?.isShared !== 1
 
   if (!activeLogbookId) {
     return (
@@ -445,13 +458,14 @@ function App() {
         {/* Active Logbook Header */}
         <header className="app-header">
           <div className="app-header-left">
-            <button className="btn-back" onClick={handleBackToDashboard}>
+            <button className="btn-back" onClick={handleBackToDashboard} title={t('nav.dashboard')}>
               <ChevronLeft size={16} />
-              {t('nav.dashboard')}
+              <span className="hide-mobile">{t('nav.dashboard')}</span>
             </button>
             <div className="app-title-area">
               <div className="app-title-row">
                 <h2>{activeLogbookTitle}</h2>
+                <BetaBadge />
                 {activeAccessRole && activeAccessRole !== 'OWNER' && (
                   <LogbookRoleBadge role={activeAccessRole} />
                 )}
@@ -503,7 +517,7 @@ function App() {
         <aside className="app-sidebar">
           <button
             className={`sidebar-btn ${activeTab === 'logs' ? 'active' : ''}`}
-            onClick={() => setActiveTab('logs')}
+            onClick={() => void handleTabChange('logs')}
             data-tour="nav-logs"
           >
             <FileText size={18} />
@@ -512,7 +526,7 @@ function App() {
           
           <button
             className={`sidebar-btn ${activeTab === 'vessel' ? 'active' : ''}`}
-            onClick={() => setActiveTab('vessel')}
+            onClick={() => void handleTabChange('vessel')}
             data-tour="nav-vessel"
           >
             <Ship size={18} />
@@ -521,7 +535,7 @@ function App() {
 
           <button
             className={`sidebar-btn ${activeTab === 'crew' ? 'active' : ''}`}
-            onClick={() => setActiveTab('crew')}
+            onClick={() => void handleTabChange('crew')}
             data-tour="nav-crew"
           >
             <Users size={18} />
@@ -540,7 +554,7 @@ function App() {
 
           <button
             className={`sidebar-btn ${activeTab === 'stats' ? 'active' : ''}`}
-            onClick={() => setActiveTab('stats')}
+            onClick={() => void handleTabChange('stats')}
             data-tour="nav-stats"
           >
             <BarChart2 size={18} />
@@ -549,7 +563,7 @@ function App() {
 
           <button
             className={`sidebar-btn ${activeTab === 'settings' ? 'active' : ''}`}
-            onClick={() => setActiveTab('settings')}
+            onClick={() => void handleTabChange('settings')}
           >
             <Settings size={18} />
             {t('nav.settings')}
@@ -569,11 +583,15 @@ function App() {
           )}
 
           {activeTab === 'vessel' && (
-            <VesselForm logbookId={activeLogbookId} readOnly={logbookReadOnly} />
+            <VesselForm logbookId={activeLogbookId} readOnly={logbookReadOnly || !isLogbookOwner} />
           )}
 
           {activeTab === 'crew' && (
-            <CrewForm logbookId={activeLogbookId} readOnly={logbookReadOnly} />
+            <CrewForm
+              logbookId={activeLogbookId}
+              readOnly={logbookReadOnly}
+              skipperReadOnly={!isLogbookOwner}
+            />
           )}
 
           {activeTab === 'stats' && activeLogbookId && activeLogbookTitle && (
@@ -602,12 +620,14 @@ function App() {
 export default function AppWrapper() {
   return (
     <DialogProvider>
+      <UnsavedChangesProvider>
         <AppTourProvider>
           <PwaUpdatePrompt />
           <App />
           <AppTourOverlay />
         </AppTourProvider>
         <AppFooter />
+      </UnsavedChangesProvider>
     </DialogProvider>
   )
 }

client/src/components/AppTourOverlay.tsx

@@ -15,12 +15,33 @@ interface SpotlightRect {
   height: number
 }
 
+const TOOLTIP_EDGE_MARGIN = 16
+const TOOLTIP_ESTIMATED_HEIGHT = 240
+
 function buildCutoutClipPath(rect: SpotlightRect): string {
   const right = rect.left + rect.width
   const bottom = rect.top + rect.height
   return `polygon(evenodd, 0 0, 100vw 0, 100vw 100vh, 0 100vh, 0 0, ${rect.left}px ${rect.top}px, ${right}px ${rect.top}px, ${right}px ${bottom}px, ${rect.left}px ${bottom}px, ${rect.left}px ${rect.top}px)`
 }
 
+function computeTooltipTop(spotlight: SpotlightRect): number {
+  const viewportBottom = window.innerHeight - TOOLTIP_EDGE_MARGIN
+  const below = spotlight.top + spotlight.height + 12
+  if (below + TOOLTIP_ESTIMATED_HEIGHT <= viewportBottom) {
+    return below
+  }
+
+  const above = spotlight.top - 12 - TOOLTIP_ESTIMATED_HEIGHT
+  if (above >= TOOLTIP_EDGE_MARGIN) {
+    return above
+  }
+
+  return Math.max(
+    TOOLTIP_EDGE_MARGIN,
+    Math.min(below, viewportBottom - TOOLTIP_ESTIMATED_HEIGHT)
+  )
+}
+
 export default function AppTourOverlay() {
   const { t } = useTranslation()
   const {
@@ -111,12 +132,8 @@ export default function AppTourOverlay() {
   const tooltipStyle = centered
     ? undefined
     : spotlight
-      ? {
+      ? { top: computeTooltipTop(spotlight) }
-          top: Math.min(window.innerHeight - 220, spotlight.top + spotlight.height + 12),
+      : { top: '20%' }
-          left: Math.min(window.innerWidth - 340, Math.max(16, spotlight.left)),
-          maxWidth: '420px'
-        }
-      : { top: '20%', left: '50%', transform: 'translateX(-50%)', maxWidth: '420px' }
 
   const backdropStyle = spotlight && !centered
     ? { clipPath: buildCutoutClipPath(spotlight) }

client/src/components/AuthOnboarding.tsx

@@ -13,6 +13,7 @@ import {
 } from '../services/auth.js'
 import { KeyRound, ShieldAlert, Languages, HelpCircle, UserRound, X } from 'lucide-react'
 import RegistrationDisclaimer from './RegistrationDisclaimer.tsx'
+import BetaBadge from './BetaBadge.tsx'
 
 interface AuthOnboardingProps {
   onAuthenticated: () => void
@@ -272,6 +273,7 @@ export default function AuthOnboarding({ onAuthenticated, onOpenDemo }: AuthOnbo
             </label>
             <input
               type="password"
+              name="new-pin"
               inputMode="numeric"
               pattern="[0-9]*"
               maxLength={8}
@@ -281,6 +283,7 @@ export default function AuthOnboarding({ onAuthenticated, onOpenDemo }: AuthOnbo
               onChange={(e) => setPinInput(e.target.value.replace(/\D/g, ''))}
               disabled={loading}
               required
+              autoComplete="new-password"
               style={{ width: '100%', padding: '12px', boxSizing: 'border-box' }}
             />
           </div>
@@ -321,6 +324,7 @@ export default function AuthOnboarding({ onAuthenticated, onOpenDemo }: AuthOnbo
           <div className="input-group">
             <input
               type="password"
+              name="pin"
               inputMode="numeric"
               pattern="[0-9]*"
               maxLength={8}
@@ -330,6 +334,7 @@ export default function AuthOnboarding({ onAuthenticated, onOpenDemo }: AuthOnbo
               onChange={(e) => setPinLoginInput(e.target.value.replace(/\D/g, ''))}
               disabled={loading}
               required
+              autoComplete="current-password"
               style={{ width: '100%', padding: '12px', boxSizing: 'border-box' }}
             />
           </div>
@@ -408,7 +413,10 @@ export default function AuthOnboarding({ onAuthenticated, onOpenDemo }: AuthOnbo
     <div className="auth-card glass">
       <div className="auth-brand">
         <img src="/logo.png" alt="Kapteins Daagbok" className="auth-logo-img" />
+        <div className="auth-brand-title-row">
           <h1>{t('app.name')}</h1>
+          <BetaBadge />
+        </div>
         <p className="tagline">{t('auth.tagline')}</p>
       </div>
 

client/src/components/BetaBadge.tsx

@@ -0,0 +1,19 @@
+import { useTranslation } from 'react-i18next'
+
+interface BetaBadgeProps {
+  className?: string
+}
+
+export default function BetaBadge({ className = '' }: BetaBadgeProps) {
+  const { t } = useTranslation()
+
+  return (
+    <span
+      className={`beta-badge ${className}`.trim()}
+      title={t('app.beta_hint')}
+      aria-label={t('app.beta_hint')}
+    >
+      {t('app.beta')}
+    </span>
+  )
+}

client/src/components/CrewForm.tsx

@@ -12,6 +12,7 @@ import { Users, User, Plus, Trash2, Edit2, Save, X, Check, Camera } from 'lucide
 interface CrewFormProps {
   logbookId: string
   readOnly?: boolean
+  skipperReadOnly?: boolean
   preloadedData?: any[]
 }
 
@@ -34,9 +35,15 @@ interface DecryptedCrew {
   data: CrewMemberData
 }
 
-export default function CrewForm({ logbookId, readOnly = false, preloadedData }: CrewFormProps) {
+export default function CrewForm({
+  logbookId,
+  readOnly = false,
+  skipperReadOnly = false,
+  preloadedData
+}: CrewFormProps) {
   const { t } = useTranslation()
   const { showConfirm } = useDialog()
+  const skipperFormReadOnly = readOnly || skipperReadOnly
 
   // Skipper profile state
   const [skipName, setSkipName] = useState('')
@@ -192,7 +199,7 @@ export default function CrewForm({ logbookId, readOnly = false, preloadedData }:
 
   const handleSaveSkipper = async (e: React.FormEvent) => {
     e.preventDefault()
-    if (readOnly) return
+    if (skipperFormReadOnly) return
     setSavingSkipper(true)
     setError(null)
     setSkipperSuccess(false)
@@ -397,10 +404,14 @@ export default function CrewForm({ logbookId, readOnly = false, preloadedData }:
 
         {error && <div className="auth-error mb-4">{error}</div>}
 
+        {skipperReadOnly && !readOnly && (
+          <p className="help-text mb-4">{t('crew.skipper_read_only_hint')}</p>
+        )}
+
         <form onSubmit={handleSaveSkipper} className="vessel-form">
           <div className="form-grid">
             <div className="vessel-photo-wrapper">
-              <div className="vessel-photo-preview" onClick={readOnly ? undefined : () => skipFileInputRef.current?.click()} style={{ cursor: readOnly ? 'default' : 'pointer' }}>
+              <div className="vessel-photo-preview" onClick={skipperFormReadOnly ? undefined : () => skipFileInputRef.current?.click()} style={{ cursor: skipperFormReadOnly ? 'default' : 'pointer' }}>
                 {skipPhoto ? (
                   <img src={skipPhoto} alt={skipName || 'Skipper'} className="vessel-photo" />
                 ) : (
@@ -408,7 +419,7 @@ export default function CrewForm({ logbookId, readOnly = false, preloadedData }:
                     <User size={48} className="placeholder-icon" />
                   </div>
                 )}
-                {!readOnly && (
+                {!skipperFormReadOnly && (
                   <div className="vessel-photo-overlay">
                     <Camera size={24} />
                     <span>{skipPhoto ? t('vessel.photo_change') : t('vessel.photo_add')}</span>
@@ -416,7 +427,7 @@ export default function CrewForm({ logbookId, readOnly = false, preloadedData }:
                 )}
               </div>
               
-              {!readOnly && (
+              {!skipperFormReadOnly && (
                 <div className="vessel-photo-actions">
                   <button
                     type="button"
@@ -473,7 +484,7 @@ export default function CrewForm({ logbookId, readOnly = false, preloadedData }:
                 className="input-text"
                 value={skipName}
                 onChange={(e) => setSkipName(e.target.value)}
-                disabled={savingSkipper || readOnly}
+                disabled={savingSkipper || skipperFormReadOnly}
                 required
               />
             </div>
@@ -485,7 +496,7 @@ export default function CrewForm({ logbookId, readOnly = false, preloadedData }:
                 className="input-text"
                 value={skipAddress}
                 onChange={(e) => setSkipAddress(e.target.value)}
-                disabled={savingSkipper || readOnly}
+                disabled={savingSkipper || skipperFormReadOnly}
               />
             </div>
 
@@ -496,7 +507,7 @@ export default function CrewForm({ logbookId, readOnly = false, preloadedData }:
                 className="input-text"
                 value={skipBirthDate}
                 onChange={(e) => setSkipBirthDate(e.target.value)}
-                disabled={savingSkipper || readOnly}
+                disabled={savingSkipper || skipperFormReadOnly}
               />
             </div>
 
@@ -507,7 +518,7 @@ export default function CrewForm({ logbookId, readOnly = false, preloadedData }:
                 className="input-text"
                 value={skipPhone}
                 onChange={(e) => setSkipPhone(e.target.value)}
-                disabled={savingSkipper || readOnly}
+                disabled={savingSkipper || skipperFormReadOnly}
               />
             </div>
 
@@ -518,7 +529,7 @@ export default function CrewForm({ logbookId, readOnly = false, preloadedData }:
                 className="input-text"
                 value={skipNationality}
                 onChange={(e) => setSkipNationality(e.target.value)}
-                disabled={savingSkipper || readOnly}
+                disabled={savingSkipper || skipperFormReadOnly}
               />
             </div>
 
@@ -529,7 +540,7 @@ export default function CrewForm({ logbookId, readOnly = false, preloadedData }:
                 className="input-text"
                 value={skipPassport}
                 onChange={(e) => setSkipPassport(e.target.value)}
-                disabled={savingSkipper || readOnly}
+                disabled={savingSkipper || skipperFormReadOnly}
               />
             </div>
 
@@ -540,7 +551,7 @@ export default function CrewForm({ logbookId, readOnly = false, preloadedData }:
                 className="input-text"
                 value={skipBloodType}
                 onChange={(e) => setSkipBloodType(e.target.value)}
-                disabled={savingSkipper || readOnly}
+                disabled={savingSkipper || skipperFormReadOnly}
               />
             </div>
 
@@ -551,7 +562,7 @@ export default function CrewForm({ logbookId, readOnly = false, preloadedData }:
                 className="input-text"
                 value={skipAllergies}
                 onChange={(e) => setSkipAllergies(e.target.value)}
-                disabled={savingSkipper || readOnly}
+                disabled={savingSkipper || skipperFormReadOnly}
               />
             </div>
 
@@ -562,12 +573,12 @@ export default function CrewForm({ logbookId, readOnly = false, preloadedData }:
                 className="input-text"
                 value={skipDiseases}
                 onChange={(e) => setSkipDiseases(e.target.value)}
-                disabled={savingSkipper || readOnly}
+                disabled={savingSkipper || skipperFormReadOnly}
               />
             </div>
           </div>
 
-          {!readOnly && (
+          {!skipperFormReadOnly && (
             <div className="form-actions">
               {skipperSuccess && (
                 <div className="success-toast">

client/src/components/LogEntriesList.tsx

@@ -372,7 +372,7 @@ export default function LogEntriesList({
           <Calendar size={24} className="form-icon" />
           <h2>{t('logs.title')}</h2>
         </div>
-        <div style={{ display: 'flex', gap: '8px', alignItems: 'center' }}>
+        <div className="section-toolbar">
           <button className="btn secondary" onClick={handleDownloadCsv} disabled={loading || exporting || entries.length === 0} style={{ width: 'auto', padding: '8px 16px' }} title={t('logs.export_csv')}>
             <Download size={16} />
             <span className="hide-mobile">{exporting ? t('logs.exporting') : t('logs.export_csv')}</span>
@@ -384,9 +384,9 @@ export default function LogEntriesList({
           </button>
 
           {!readOnly && (
-            <button className="btn primary" onClick={handleCreate} disabled={loading || exporting} style={{ width: 'auto', padding: '8px 16px' }}>
+            <button className="btn primary" onClick={handleCreate} disabled={loading || exporting} style={{ width: 'auto', padding: '8px 16px' }} title={t('logs.new_entry')}>
               <Plus size={16} />
-              {t('logs.new_entry')}
+              <span className="hide-mobile">{t('logs.new_entry')}</span>
             </button>
           )}
         </div>

client/src/components/LogEntryEditor.tsx

@@ -16,11 +16,13 @@ import {
   fingerprintSignature,
   normalizedSerializedSignature,
   isPasskeySignature,
+  isClassicSignature,
+  createClassicSignature,
   isSignatureValidForEntry,
   hasAnySignature
 } from '../utils/signatures.js'
 import type { SignatureValue } from '../types/signatures.js'
-import { buildLogEntryPayload, type LogEventPayload } from '../utils/logEntryPayload.js'
+import { buildLogEntryPayload, sortLogEventsByTime, normalizeLogEvent, logEventsEqual, type LogEventPayload } from '../utils/logEntryPayload.js'
 import { hashEntryForSigning } from '../utils/entryCanonicalHash.js'
 import { signLogEntry } from '../services/entrySigning.js'
 import { getLogbookAccess } from '../services/logbookAccess.js'
@@ -35,6 +37,8 @@ import {
   type SavedTrack
 } from '../services/trackUpload.js'
 import { computeTrackStats, formatTrackStats } from '../utils/trackStats.js'
+import { computeFuelPerMotorHour, formatFuelPerMotorHour } from '../utils/fuelStats.js'
+import { useRegisterUnsavedChanges } from '../context/UnsavedChangesContext.tsx'
 
 function emptyTankLevels() {
   return { morning: 0, refilled: 0, evening: 0, consumption: 0 }
@@ -46,6 +50,7 @@ function fingerprintFromStoredEntry(decrypted: Record<string, unknown>): string
   const trackDistance = decrypted.trackDistanceNm
   const trackSpeedMax = decrypted.trackSpeedMaxKn
   const trackSpeedAvg = decrypted.trackSpeedAvgKn
+  const motorHoursRaw = decrypted.motorHours
 
   const payload = buildLogEntryPayload({
     date: String(decrypted.date || ''),
@@ -76,6 +81,10 @@ function fingerprintFromStoredEntry(decrypted: Record<string, unknown>): string
       trackSpeedAvg != null && trackSpeedAvg !== ''
         ? parseFloat(String(trackSpeedAvg))
         : undefined,
+    motorHours:
+      motorHoursRaw != null && motorHoursRaw !== ''
+        ? parseFloat(String(motorHoursRaw))
+        : undefined,
     events: (decrypted.events as LogEventPayload[]) || []
   })
 
@@ -137,7 +146,7 @@ export default function LogEntryEditor({
   const [signSkipper, setSignSkipper] = useState<SignatureValue | ''>('')
   const [signCrew, setSignCrew] = useState<SignatureValue | ''>('')
   const [canSignSkipper, setCanSignSkipper] = useState(false)
-  const [hasWriteCollaborators, setHasWriteCollaborators] = useState(false)
+  const [canSignCrew, setCanSignCrew] = useState(false)
   const [isOnline, setIsOnline] = useState(navigator.onLine)
   const [entryHash, setEntryHash] = useState('')
 
@@ -146,6 +155,9 @@ export default function LogEntryEditor({
   const [trackSpeedMaxKn, setTrackSpeedMaxKn] = useState('')
   const [trackSpeedAvgKn, setTrackSpeedAvgKn] = useState('')
 
+  // Motor hours under engine propulsion (per travel day)
+  const [motorHours, setMotorHours] = useState('')
+
   // Events list state
   const [events, setEvents] = useState<LogEvent[]>([])
 
@@ -206,6 +218,11 @@ export default function LogEntryEditor({
     if (entry?.trackSpeedAvgKn != null && entry.trackSpeedAvgKn !== '') {
       setTrackSpeedAvgKn(String(entry.trackSpeedAvgKn))
     }
+    if (entry?.motorHours != null && entry.motorHours !== '') {
+      setMotorHours(String(entry.motorHours))
+    } else {
+      setMotorHours('')
+    }
   }
 
   const buildPayloadForSigning = useCallback((eventsOverride?: LogEvent[]) => {
@@ -229,16 +246,22 @@ export default function LogEntryEditor({
       trackDistanceNm: trackDistanceNm.trim() ? parseFloat(trackDistanceNm) : undefined,
       trackSpeedMaxKn: trackSpeedMaxKn.trim() ? parseFloat(trackSpeedMaxKn) : undefined,
       trackSpeedAvgKn: trackSpeedAvgKn.trim() ? parseFloat(trackSpeedAvgKn) : undefined,
+      motorHours: motorHours.trim() ? parseFloat(motorHours) : undefined,
       events: eventsOverride ?? events
     })
   }, [
     date, dayOfTravel, departure, destination,
     fwMorning, fwRefilled, fwEvening, fwConsumption,
     fuelMorning, fuelRefilled, fuelEvening, fuelConsumption,
-    trackDistanceNm, trackSpeedMaxKn, trackSpeedAvgKn,
+    trackDistanceNm, trackSpeedMaxKn, trackSpeedAvgKn, motorHours,
     events
   ])
 
+  const fuelPerMotorHour = useMemo(
+    () => computeFuelPerMotorHour(parseFloat(fuelConsumption) || 0, parseFloat(motorHours) || 0),
+    [fuelConsumption, motorHours]
+  )
+
   const currentFingerprint = useMemo(() => {
     const payload = buildPayloadForSigning()
     return JSON.stringify({
@@ -248,7 +271,60 @@ export default function LogEntryEditor({
     })
   }, [buildPayloadForSigning, signSkipper, signCrew])
 
-  const isDirty = savedFingerprint !== null && currentFingerprint !== savedFingerprint
+  const buildEventFromForm = (): LogEvent =>
+    normalizeLogEvent({
+      time: evTime,
+      mgk: evMgk,
+      rwk: evRwk,
+      windPressure: evWindPressure,
+      windDirection: evWindDirection,
+      windStrength: evWindStrength,
+      seaState: evSeaState,
+      weatherIcon: evWeatherIcon,
+      current: evCurrent,
+      heel: evHeel,
+      sailsOrMotor: evSailsOrMotor,
+      logReading: evLogReading,
+      distance: evDistance,
+      gpsLat: evGpsLat,
+      gpsLng: evGpsLng,
+      remarks: evRemarks
+    })
+
+  const applyEventFormToEvents = (eventData: LogEvent): LogEvent[] => {
+    if (editingEventIndex !== null) {
+      return sortLogEventsByTime(events.map((ev, idx) => (idx === editingEventIndex ? eventData : ev)))
+    }
+    return sortLogEventsByTime([...events, eventData])
+  }
+
+  const hasPendingEventForm = useMemo(() => {
+    if (!evTime.trim()) return false
+    const draft = buildEventFromForm()
+    if (editingEventIndex !== null) {
+      const original = events[editingEventIndex]
+      return original ? !logEventsEqual(draft, original) : false
+    }
+    return true
+  }, [
+    evTime, evMgk, evRwk, evWindPressure, evWindDirection, evWindStrength, evSeaState,
+    evWeatherIcon, evCurrent, evHeel, evSailsOrMotor, evLogReading, evDistance,
+    evGpsLat, evGpsLng, evRemarks, editingEventIndex, events
+  ])
+
+  const isDirty = savedFingerprint !== null && (
+    currentFingerprint !== savedFingerprint || hasPendingEventForm
+  )
+
+  const { confirmLeave } = useRegisterUnsavedChanges(
+    `log-entry-${entryId}`,
+    !readOnly && !loading && isDirty
+  )
+
+  const handleBack = async () => {
+    if (!(await confirmLeave())) return
+    onBack()
+  }
 
   const persistEntryToDb = useCallback(async (eventsOverride?: LogEvent[]) => {
     if (readOnly) return
@@ -308,8 +384,11 @@ export default function LogEntryEditor({
   useEffect(() => {
     getLogbookAccess(logbookId).then((access) => {
       if (!access) return
-      setCanSignSkipper(access.isOwner || access.role === 'WRITE')
+      setCanSignSkipper(access.isOwner)
-      setHasWriteCollaborators(access.writeCollaboratorCount > 0)
+      setCanSignCrew(
+        access.role === 'WRITE' ||
+        (access.isOwner && access.writeCollaboratorCount === 0)
+      )
     })
   }, [logbookId])
 
@@ -375,6 +454,7 @@ export default function LogEntryEditor({
   const crewSignatureValid = !isPasskeySignature(signCrew) || isSignatureValidForEntry(signCrew, entryHash)
 
   const handlePasskeySignSkipper = async () => {
+    if (!canSignSkipper) return
     const confirmed = await confirmSignWarning()
     if (!confirmed) return
 
@@ -392,6 +472,7 @@ export default function LogEntryEditor({
   }
 
   const handlePasskeySignCrew = async () => {
+    if (!canSignCrew) return
     const confirmed = await confirmSignWarning()
     if (!confirmed) return
 
@@ -483,7 +564,7 @@ export default function LogEntryEditor({
           setSignSkipper(normalizeSignature(preloadedEntry.signSkipper) || '')
           setSignCrew(normalizeSignature(preloadedEntry.signCrew) || '')
           loadTrackStatsFromEntry(preloadedEntry)
-          setEvents(preloadedEntry.events || [])
+          setEvents(sortLogEventsByTime((preloadedEntry.events || []).map(normalizeLogEvent)))
           setSavedFingerprint(fingerprintFromStoredEntry(preloadedEntry))
           return
         }
@@ -516,7 +597,7 @@ export default function LogEntryEditor({
             setSignSkipper(normalizeSignature(decrypted.signSkipper) || '')
             setSignCrew(normalizeSignature(decrypted.signCrew) || '')
             loadTrackStatsFromEntry(decrypted)
-            setEvents(decrypted.events || [])
+            setEvents(sortLogEventsByTime((decrypted.events || []).map(normalizeLogEvent)))
             setSavedFingerprint(fingerprintFromStoredEntry(decrypted))
           }
         }
@@ -783,25 +864,6 @@ export default function LogEntryEditor({
     return currentItems.includes(item.toLowerCase())
   }
 
-  const buildEventFromForm = (): LogEvent => ({
-    time: evTime,
-    mgk: evMgk.trim(),
-    rwk: evRwk.trim(),
-    windPressure: evWindPressure.trim(),
-    windDirection: evWindDirection.trim(),
-    windStrength: evWindStrength.trim(),
-    seaState: evSeaState.trim(),
-    weatherIcon: evWeatherIcon.trim(),
-    current: evCurrent.trim(),
-    heel: evHeel.trim(),
-    sailsOrMotor: evSailsOrMotor.trim(),
-    logReading: evLogReading.trim(),
-    distance: evDistance.trim(),
-    gpsLat: evGpsLat.trim(),
-    gpsLng: evGpsLng.trim(),
-    remarks: evRemarks.trim()
-  })
-
   const clearEventForm = () => {
     setEvTime('')
     setEvMgk('')
@@ -824,22 +886,23 @@ export default function LogEntryEditor({
   }
 
   const fillEventForm = (ev: LogEvent) => {
-    setEvTime(ev.time)
+    const normalized = normalizeLogEvent(ev)
-    setEvMgk(ev.mgk)
+    setEvTime(normalized.time)
-    setEvRwk(ev.rwk)
+    setEvMgk(normalized.mgk)
-    setEvWindPressure(ev.windPressure)
+    setEvRwk(normalized.rwk)
-    setEvWindDirection(ev.windDirection)
+    setEvWindPressure(normalized.windPressure)
-    setEvWindStrength(ev.windStrength)
+    setEvWindDirection(normalized.windDirection)
-    setEvSeaState(ev.seaState)
+    setEvWindStrength(normalized.windStrength)
-    setEvWeatherIcon(ev.weatherIcon)
+    setEvSeaState(normalized.seaState)
-    setEvCurrent(ev.current)
+    setEvWeatherIcon(normalized.weatherIcon)
-    setEvHeel(ev.heel)
+    setEvCurrent(normalized.current)
-    setEvSailsOrMotor(ev.sailsOrMotor)
+    setEvHeel(normalized.heel)
-    setEvLogReading(ev.logReading)
+    setEvSailsOrMotor(normalized.sailsOrMotor)
-    setEvDistance(ev.distance)
+    setEvLogReading(normalized.logReading)
-    setEvGpsLat(ev.gpsLat)
+    setEvDistance(normalized.distance)
-    setEvGpsLng(ev.gpsLng)
+    setEvGpsLat(normalized.gpsLat)
-    setEvRemarks(ev.remarks)
+    setEvGpsLng(normalized.gpsLng)
+    setEvRemarks(normalized.remarks)
     setEvLocationName('')
   }
 
@@ -866,27 +929,25 @@ export default function LogEntryEditor({
     if (readOnly || !evTime) return
 
     const eventData = buildEventFromForm()
-    let nextEvents: LogEvent[]
+    const isEdit = editingEventIndex !== null
+    const hadSkipperSignature = isEdit && !!signSkipper
 
-    if (editingEventIndex !== null) {
+    if (hadSkipperSignature) {
-      const hadSkipperSignature = !!signSkipper
       markSkipperSignatureClearedForEventChange()
-      nextEvents = events.map((ev, idx) => (idx === editingEventIndex ? eventData : ev))
+    }
+
+    const nextEvents = applyEventFormToEvents(eventData)
+
+    try {
+      await persistEntryToDb(nextEvents)
+      setEvents(nextEvents)
+      clearEventForm()
       if (hadSkipperSignature) {
         void showAlertRef.current(
           t('logs.sign_cleared_skipper_re_sign'),
           t('logs.sign_cleared_skipper_re_sign_title')
         )
       }
-    } else {
-      nextEvents = [...events, eventData]
-    }
-
-    setEvents(nextEvents)
-    clearEventForm()
-
-    try {
-      await persistEntryToDb(nextEvents)
     } catch (err: any) {
       console.error('Failed to auto-save event:', err)
       setError(err.message || 'Failed to save event.')
@@ -935,13 +996,28 @@ export default function LogEntryEditor({
 
   const handleSubmit = async (e: React.FormEvent) => {
     e.preventDefault()
-    if (readOnly || !isDirty) return
+    if (readOnly) return
+
+    let eventsToSave = events
+
+    if (hasPendingEventForm) {
+      const isEdit = editingEventIndex !== null
+      if (isEdit && signSkipper) {
+        markSkipperSignatureClearedForEventChange()
+      }
+      eventsToSave = applyEventFormToEvents(buildEventFromForm())
+      setEvents(eventsToSave)
+      clearEventForm()
+    } else if (!isDirty) {
+      return
+    }
+
     setSaving(true)
     setError(null)
     setSuccess(false)
 
     try {
-      await persistEntryToDb()
+      await persistEntryToDb(eventsToSave)
 
       setSuccess(true)
       trackPlausibleEvent(PlausibleEvents.TRAVEL_DAY_SAVED)
@@ -972,7 +1048,7 @@ export default function LogEntryEditor({
       <div className="form-card" style={{ paddingBottom: '20px' }}>
         <div className="section-title-bar">
           <div className="section-title-left">
-            <button className="btn-back" onClick={onBack} style={{ padding: '6px 12px' }}>
+            <button className="btn-back" onClick={() => void handleBack()} style={{ padding: '6px 12px' }}>
               <ChevronLeft size={16} />
               {t('logs.back_to_list')}
             </button>
@@ -992,7 +1068,7 @@ export default function LogEntryEditor({
             style={{ width: 'auto', padding: '8px 16px' }}
           >
             <Download size={16} />
-            <span>{exporting ? t('logs.exporting_pdf') : t('logs.export_pdf')}</span>
+            <span className="hide-mobile">{exporting ? t('logs.exporting_pdf') : t('logs.export_pdf')}</span>
           </button>
         </div>
       </div>
@@ -1053,6 +1129,20 @@ export default function LogEntryEditor({
                 disabled={saving || readOnly}
               />
             </div>
+
+            <div className="input-group">
+              <label>{t('logs.motor_hours')}</label>
+              <input
+                type="number"
+                className="input-text"
+                value={motorHours}
+                onChange={(e) => setMotorHours(e.target.value)}
+                disabled={saving || readOnly}
+                min="0"
+                step="0.1"
+                placeholder="0"
+              />
+            </div>
           </div>
         </div>
 
@@ -1163,6 +1253,22 @@ export default function LogEntryEditor({
                   aria-readonly="true"
                 />
               </div>
+
+              <div className="input-group">
+                <label>{t('logs.fuel_per_motor_hour')}</label>
+                <input
+                  type="text"
+                  className="input-text consumption-value"
+                  value={
+                    fuelPerMotorHour != null
+                      ? `${formatFuelPerMotorHour(fuelPerMotorHour)} L/h`
+                      : '—'
+                  }
+                  readOnly
+                  tabIndex={-1}
+                  aria-readonly="true"
+                />
+              </div>
             </div>
           </div>
         </div>
@@ -1567,15 +1673,16 @@ export default function LogEntryEditor({
                     )}
                   </span>
                 </div>
-                <div style={{ display: 'flex', gap: '8px', flexWrap: 'wrap' }}>
+                <div className="track-actions">
                   <button
                     type="button"
                     className="btn secondary"
                     onClick={() => downloadTrackFile(savedTrack)}
                     style={{ width: 'auto', padding: '6px 12px', fontSize: '13px', display: 'flex', alignItems: 'center', gap: '4px' }}
+                    title={t('logs.gps_tracking_btn_gpx')}
                   >
                     <Download size={14} />
-                    {t('logs.gps_tracking_btn_gpx')}
+                    <span className="hide-mobile">{t('logs.gps_tracking_btn_gpx')}</span>
                   </button>
                   {!readOnly && (
                     <button
@@ -1583,9 +1690,10 @@ export default function LogEntryEditor({
                       className="btn secondary"
                       onClick={handleDeleteTrack}
                       style={{ width: 'auto', padding: '6px 12px', fontSize: '13px', display: 'flex', alignItems: 'center', gap: '4px', background: 'rgba(239, 68, 68, 0.1)', color: '#ef4444', borderColor: 'rgba(239, 68, 68, 0.2)' }}
+                      title={t('logs.gps_track_delete')}
                     >
                       <Trash2 size={14} />
-                      {t('logs.gps_track_delete')}
+                      <span className="hide-mobile">{t('logs.gps_track_delete')}</span>
                     </button>
                   )}
                 </div>
@@ -1646,13 +1754,40 @@ export default function LogEntryEditor({
           disabled={saving}
           isOnline={isOnline}
           canSignSkipper={canSignSkipper}
-          hasWriteCollaborators={hasWriteCollaborators}
+          canSignCrew={canSignCrew}
           signSkipper={signSkipper}
           signCrew={signCrew}
           skipperSignatureValid={skipperSignatureValid}
           crewSignatureValid={crewSignatureValid}
-          onSignSkipperChange={setSignSkipper}
+          onSignSkipperChange={(value) => {
-          onSignCrewChange={setSignCrew}
+            if (canSignSkipper && !readOnly) setSignSkipper(value)
+          }}
+          onSignCrewChange={(value) => {
+            if (!canSignCrew || readOnly) return
+            if (!value) {
+              setSignCrew('')
+              return
+            }
+            if (isPasskeySignature(value) || isClassicSignature(value)) {
+              setSignCrew(value)
+              return
+            }
+            if (!canSignSkipper) {
+              const userId = localStorage.getItem('active_userid') || ''
+              const username = localStorage.getItem('active_username') || ''
+              if (userId && username) {
+                setSignCrew(createClassicSignature({
+                  role: 'crew',
+                  userId,
+                  username,
+                  signedAt: new Date().toISOString(),
+                  payload: value
+                }))
+                return
+              }
+            }
+            setSignCrew(value)
+          }}
           onPasskeySignSkipper={handlePasskeySignSkipper}
           onPasskeySignCrew={handlePasskeySignCrew}
           onBeforeSign={confirmSignWarning}

client/src/components/LogbookBackupPanel.tsx

@@ -58,6 +58,16 @@ export default function LogbookBackupPanel({ logbookId, onRestored }: LogbookBac
   const [error, setError] = useState<string | null>(null)
   const [success, setSuccess] = useState<string | null>(null)
 
+  const handleExportSubmit = async (e: React.FormEvent) => {
+    e.preventDefault()
+    await handleExport()
+  }
+
+  const handleImportSubmit = async (e: React.FormEvent) => {
+    e.preventDefault()
+    await handleRestore()
+  }
+
   const handleExport = async () => {
     setError(null)
     setSuccess(null)
@@ -209,10 +219,12 @@ export default function LogbookBackupPanel({ logbookId, onRestored }: LogbookBac
         </h4>
         <p className="text-muted backup-section-desc">{t('settings.backup_export_desc')}</p>
 
+        <form onSubmit={handleExportSubmit} className="backup-export-form">
           <div className="input-group">
             <label htmlFor="backup-export-passphrase">{t('settings.backup_passphrase')}</label>
             <input
               id="backup-export-passphrase"
+              name="backup-export-passphrase"
               type="password"
               className="input-text"
               value={exportPassphrase}
@@ -220,29 +232,32 @@ export default function LogbookBackupPanel({ logbookId, onRestored }: LogbookBac
               placeholder={t('settings.backup_passphrase_placeholder')}
               autoComplete="new-password"
               disabled={exporting}
+              required
             />
           </div>
           <div className="input-group">
             <label htmlFor="backup-export-confirm">{t('settings.backup_passphrase_confirm')}</label>
             <input
               id="backup-export-confirm"
+              name="backup-export-confirm"
               type="password"
               className="input-text"
               value={exportConfirm}
               onChange={(e) => setExportConfirm(e.target.value)}
               autoComplete="new-password"
               disabled={exporting}
+              required
             />
           </div>
           <button
-          type="button"
+            type="submit"
             className="btn primary"
-          onClick={handleExport}
             disabled={exporting || !exportPassphrase || !exportConfirm}
           >
             <Download size={16} />
             {exporting ? t('settings.backup_exporting') : t('settings.backup_export_btn')}
           </button>
+        </form>
       </section>
 
       <section className="backup-section backup-section--import" aria-labelledby="backup-import-heading">
@@ -252,6 +267,7 @@ export default function LogbookBackupPanel({ logbookId, onRestored }: LogbookBac
         </h4>
         <p className="text-muted backup-section-desc">{t('settings.backup_restore_desc')}</p>
 
+        <form onSubmit={handleImportSubmit} className="backup-import-form">
           <div className="input-group">
             <label htmlFor="backup-import-file">{t('settings.backup_file_label')}</label>
             <input
@@ -271,6 +287,7 @@ export default function LogbookBackupPanel({ logbookId, onRestored }: LogbookBac
                 <label htmlFor="backup-import-passphrase">{t('settings.backup_passphrase')}</label>
                 <input
                   id="backup-import-passphrase"
+                  name="backup-import-passphrase"
                   type="password"
                   className="input-text"
                   value={importPassphrase}
@@ -280,6 +297,7 @@ export default function LogbookBackupPanel({ logbookId, onRestored }: LogbookBac
                   }}
                   autoComplete="current-password"
                   disabled={importing}
+                  required
                 />
               </div>
 
@@ -293,9 +311,8 @@ export default function LogbookBackupPanel({ logbookId, onRestored }: LogbookBac
                   {previewing ? t('settings.backup_previewing') : t('settings.backup_preview_btn')}
                 </button>
                 <button
-                type="button"
+                  type="submit"
                   className="btn primary"
-                onClick={() => handleRestore()}
                   disabled={importing || !importPassphrase}
                 >
                   <Upload size={16} />
@@ -304,6 +321,7 @@ export default function LogbookBackupPanel({ logbookId, onRestored }: LogbookBac
               </div>
             </>
           )}
+        </form>
 
         {importPreview && (
           <div className="backup-preview glass">

client/src/components/LogbookDashboard.tsx

@@ -4,6 +4,7 @@ import { useLiveQuery } from 'dexie-react-hooks'
 import { db } from '../services/db.js'
 import { fetchLogbooks, createLogbook, deleteLogbook, type DecryptedLogbook } from '../services/logbook.js'
 import LogbookRoleBadge from './LogbookRoleBadge.tsx'
+import BetaBadge from './BetaBadge.tsx'
 import { PlausibleEvents, trackPlausibleEvent } from '../services/analytics.js'
 import { logoutUser } from '../services/auth.js'
 import { useDialog } from './ModalDialog.tsx'
@@ -177,7 +178,10 @@ export default function LogbookDashboard({ onSelectLogbook, onLogout }: LogbookD
         <div className="header-brand">
           <Ship className="header-logo" size={32} />
           <div>
+            <div className="header-brand-title-row">
               <h1>{t('app.name')}</h1>
+              <BetaBadge />
+            </div>
             <p className="subtitle">{t('app.tagline')}</p>
           </div>
         </div>

client/src/components/PhotoCapture.tsx

@@ -233,7 +233,6 @@ export default function PhotoCapture({ entryId, logbookId, readOnly = false, pre
             <input
               type="file"
               accept="image/*"
-              capture="environment"
               ref={fileInputRef}
               onChange={handleFileChange}
               style={{ display: 'none' }}

client/src/components/ReadOnlyViewer.tsx

@@ -1,6 +1,7 @@
 import { useState, useEffect } from 'react'
 import { useTranslation } from 'react-i18next'
 import { decryptJson } from '../services/crypto.js'
+import { PlausibleEvents, trackPlausibleEvent } from '../services/analytics.js'
 import VesselForm from './VesselForm.tsx'
 import CrewForm from './CrewForm.tsx'
 import LogEntriesList from './LogEntriesList.tsx'
@@ -124,6 +125,7 @@ export default function ReadOnlyViewer({ token, hexKey }: ReadOnlyViewerProps) {
         }
       }
       setGpsTracks(decGpsTracks)
+      trackPlausibleEvent(PlausibleEvents.PUBLIC_LINK_OPENED)
 
     } catch (err: any) {
       console.error(err)

client/src/components/SettingsForm.tsx

@@ -111,6 +111,7 @@ export default function SettingsForm({ logbookId, onLogbookRestored }: SettingsF
           const logbookKey = await ensureLogbookKey(logbookId)
           const hexKey = bufferToHex(logbookKey)
           setShareLink(`${window.location.origin}/share?token=${data.token}#key=${hexKey}`)
+          trackPlausibleEvent(PlausibleEvents.LOGBOOK_SHARED)
           showAlert('Public share link enabled!')
         } else {
           setShareEnabled(false)
@@ -292,12 +293,14 @@ export default function SettingsForm({ logbookId, onLogbookRestored }: SettingsF
             </label>
             <input
               id="owm-api-key"
+              name="owm-api-key"
               type="password"
               className="input-text"
               placeholder="e.g. 8b6a7f...d8"
               value={apiKey}
               onChange={(e) => setApiKey(e.target.value)}
               disabled={saving}
+              autoComplete="off"
             />
           </div>
         </div>
@@ -413,7 +416,7 @@ export default function SettingsForm({ logbookId, onLogbookRestored }: SettingsF
           </div>
 
           {shareEnabled && shareLink && (
-            <div className="input-group mb-4" style={{ display: 'flex', gap: '8px', alignItems: 'center' }}>
+            <div className="input-group mb-4 copy-link-row">
               <input
                 type="text"
                 readOnly
@@ -454,7 +457,7 @@ export default function SettingsForm({ logbookId, onLogbookRestored }: SettingsF
             {t('logs.invite_link_desc')}
           </p>
 
-          <div className="form-actions" style={{ justifyContent: 'flex-start', gap: '12px', marginBottom: '20px' }}>
+          <div className="form-actions form-actions--start" style={{ gap: '12px', marginBottom: '20px' }}>
             <button
               type="button"
               className="btn primary"
@@ -468,7 +471,7 @@ export default function SettingsForm({ logbookId, onLogbookRestored }: SettingsF
           </div>
 
           {inviteLink && (
-            <div className="input-group mb-6" style={{ display: 'flex', gap: '8px', alignItems: 'center' }}>
+            <div className="input-group mb-6 copy-link-row">
               <input
                 type="text"
                 readOnly

client/src/components/SignatureSection.tsx

@@ -4,7 +4,7 @@ import { Check } from 'lucide-react'
 import SignaturePad from './SignaturePad.tsx'
 import PasskeySignButton from './PasskeySignButton.tsx'
 import type { PasskeySignature, SignatureValue } from '../types/signatures.js'
-import { isPasskeySignature } from '../utils/signatures.js'
+import { isPasskeySignature, getSignaturePayload, getSignatureAttribution } from '../utils/signatures.js'
 
 type SignatureMode = 'passkey' | 'classic'
 
@@ -13,7 +13,7 @@ interface SignatureSectionProps {
   disabled?: boolean
   isOnline: boolean
   canSignSkipper: boolean
-  hasWriteCollaborators: boolean
+  canSignCrew: boolean
   signSkipper: SignatureValue | ''
   signCrew: SignatureValue | ''
   skipperSignatureValid: boolean
@@ -25,14 +25,30 @@ interface SignatureSectionProps {
   onBeforeSign?: () => Promise<boolean>
 }
 
+function SignerAttributionBadge({ value }: { value: SignatureValue | '' }) {
+  const { t, i18n } = useTranslation()
+  const attribution = getSignatureAttribution(value)
+  if (!attribution) return null
+
+  const formattedDate = new Date(attribution.signedAt).toLocaleString(
+    i18n.language === 'de' ? 'de-DE' : 'en-GB'
+  )
+
+  return (
+    <div className="passkey-sign-badge valid signature-attribution-badge">
+      <span>{t('logs.sign_passkey_signed', { username: attribution.username })}</span>
+      <span className="passkey-sign-date">{formattedDate}</span>
+    </div>
+  )
+}
+
 function padValue(value: SignatureValue | ''): string {
-  if (!value || isPasskeySignature(value)) return ''
+  return getSignaturePayload(value)
-  return value
 }
 
 function modeFromValue(value: SignatureValue | '', passkeyAvailable: boolean): SignatureMode {
   if (isPasskeySignature(value)) return 'passkey'
-  if (value) return 'classic'
+  if (getSignaturePayload(value)) return 'classic'
   return passkeyAvailable ? 'passkey' : 'classic'
 }
 
@@ -108,6 +124,7 @@ function RoleSignatureBlock({
     }
     return (
       <div className="signature-role-block">
+        <SignerAttributionBadge value={value} />
         <SignaturePad
           id={padId}
           label={roleLabel}
@@ -162,6 +179,7 @@ function RoleSignatureBlock({
 
       {showClassicPanel && (
         <>
+          <SignerAttributionBadge value={value} />
           <SignaturePad
             id={padId}
             label={roleLabel}
@@ -189,7 +207,7 @@ export default function SignatureSection({
   disabled = false,
   isOnline,
   canSignSkipper,
-  hasWriteCollaborators,
+  canSignCrew,
   signSkipper,
   signCrew,
   skipperSignatureValid,
@@ -203,7 +221,7 @@ export default function SignatureSection({
   const { t } = useTranslation()
 
   const showSkipperPasskey = canSignSkipper && isOnline
-  const showCrewPasskey = hasWriteCollaborators && isOnline
+  const showCrewPasskey = canSignCrew && isOnline
   const hasSignature = !!(signSkipper || signCrew)
 
   return (
@@ -228,7 +246,7 @@ export default function SignatureSection({
           passkeySignature={isPasskeySignature(signSkipper) ? signSkipper : undefined}
           signatureValid={skipperSignatureValid}
           showPasskey={showSkipperPasskey}
-          readOnly={readOnly}
+          readOnly={readOnly || !canSignSkipper}
           disabled={disabled}
           classicHint={showSkipperPasskey ? t('logs.sign_classic_or_passkey') : undefined}
           offlineHint={!isOnline && canSignSkipper ? t('logs.sign_offline_hint') : undefined}
@@ -245,7 +263,7 @@ export default function SignatureSection({
           passkeySignature={isPasskeySignature(signCrew) ? signCrew : undefined}
           signatureValid={crewSignatureValid}
           showPasskey={showCrewPasskey}
-          readOnly={readOnly}
+          readOnly={readOnly || !canSignCrew}
           disabled={disabled}
           classicHint={showCrewPasskey ? t('logs.sign_crew_passkey_hint') : undefined}
           onChange={onSignCrewChange}

client/src/components/StatsDashboard.tsx

@@ -1,9 +1,10 @@
 import { useCallback, useEffect, useMemo, useState, type ReactNode } from 'react'
 import { useTranslation } from 'react-i18next'
-import { BarChart2, Anchor, Droplets, Fuel, Sailboat, Gauge } from 'lucide-react'
+import { BarChart2, Anchor, Droplets, Fuel, Sailboat, Gauge, Timer } from 'lucide-react'
 import MultiTrackMap from './MultiTrackMap.tsx'
 import {
   formatLiters,
+  formatHours,
   formatNm,
   loadAccountStats,
   loadLogbookStats,
@@ -12,6 +13,7 @@ import {
   type TravelDayStats
 } from '../services/statsAggregation.js'
 import { compareTravelDaysChronological } from '../utils/logEntryTankLevels.js'
+import { formatFuelPerMotorHour } from '../utils/fuelStats.js'
 
 interface StatsDashboardProps {
   logbookId: string
@@ -78,12 +80,26 @@ function TotalsGrid({ totals }: { totals: StatsTotals }) {
         value={formatNm(totals.motorDistanceNm)}
         unit={t('stats.unit_nm')}
       />
+      <KpiCard
+        icon={<Timer size={20} />}
+        label={t('stats.motor_hours_total')}
+        value={formatHours(totals.totalMotorHours)}
+        unit={t('stats.unit_h')}
+      />
       <KpiCard
         icon={<Fuel size={20} />}
         label={t('stats.fuel_total')}
         value={formatLiters(totals.totalFuelL)}
         unit={t('stats.unit_l')}
       />
+      {totals.fuelPerMotorHourL != null && (
+        <KpiCard
+          icon={<Timer size={20} />}
+          label={t('stats.fuel_per_motor_hour')}
+          value={formatFuelPerMotorHour(totals.fuelPerMotorHourL)}
+          unit={`${t('stats.unit_l')}/${t('stats.unit_h')}`}
+        />
+      )}
       <KpiCard
         icon={<Droplets size={20} />}
         label={t('stats.water_total')}
@@ -247,6 +263,36 @@ function LogbookScopeView({ summary }: { summary: LogbookStatsSummary }) {
         />
       </div>
 
+      <div className="member-editor-card glass mt-6">
+        <h3 className="stats-section-title">{t('stats.daily_motor_hours')}</h3>
+        <p className="stats-section-sub">
+          {t('stats.avg_motor_hours')}: {formatHours(totals.avgMotorHoursPerDay)} {t('stats.unit_h')}
+          {totals.fuelPerMotorHourL != null && (
+            <>
+              {' · '}
+              {t('stats.fuel_per_motor_hour')}: {formatFuelPerMotorHour(totals.fuelPerMotorHourL)} {t('stats.unit_l')}/{t('stats.unit_h')}
+            </>
+          )}
+        </p>
+        <DailyBarChart
+          days={travelDays}
+          valueFn={(d) => d.motorHours}
+          barClass="stats-bar--motor-hours"
+          formatValue={formatHours}
+        />
+        {travelDays.some((d) => d.fuelPerMotorHourL != null) && (
+          <>
+            <h4 className="stats-section-subtitle mt-4">{t('stats.daily_fuel_per_motor_hour')}</h4>
+            <DailyBarChart
+              days={travelDays}
+              valueFn={(d) => d.fuelPerMotorHourL ?? 0}
+              barClass="stats-bar--fuel-per-hour"
+              formatValue={(v) => formatFuelPerMotorHour(v > 0 ? v : null)}
+            />
+          </>
+        )}
+      </div>
+
       <div className="member-editor-card glass mt-6">
         <h3 className="stats-section-title">{t('stats.daily_consumption')}</h3>
         <p className="stats-section-sub">
@@ -256,6 +302,9 @@ function LogbookScopeView({ summary }: { summary: LogbookStatsSummary }) {
           {totals.fuelPerNmL != null && (
             <> · {t('stats.fuel_per_nm')}: {totals.fuelPerNmL} {t('stats.unit_l')}/{t('stats.unit_nm')}</>
           )}
+          {totals.fuelPerMotorHourL != null && (
+            <> · {t('stats.fuel_per_motor_hour')}: {formatFuelPerMotorHour(totals.fuelPerMotorHourL)} {t('stats.unit_l')}/{t('stats.unit_h')}</>
+          )}
         </p>
         <ConsumptionChart days={travelDays} />
       </div>
@@ -367,6 +416,7 @@ export default function StatsDashboard({ logbookId, logbookTitle }: StatsDashboa
                         <th>{t('stats.travel_days')}</th>
                         <th>{t('stats.total_distance')}</th>
                         <th>{t('stats.fuel_total')}</th>
+                        <th>{t('stats.motor_hours_total')}</th>
                         <th>{t('stats.water_total')}</th>
                       </tr>
                     </thead>
@@ -377,6 +427,7 @@ export default function StatsDashboard({ logbookId, logbookTitle }: StatsDashboa
                           <td>{lb.totals.travelDayCount}</td>
                           <td>{formatNm(lb.totals.totalDistanceNm)} {t('stats.unit_nm')}</td>
                           <td>{formatLiters(lb.totals.totalFuelL)} {t('stats.unit_l')}</td>
+                          <td>{formatHours(lb.totals.totalMotorHours)} {t('stats.unit_h')}</td>
                           <td>{formatLiters(lb.totals.totalFreshwaterL)} {t('stats.unit_l')}</td>
                         </tr>
                       ))}
@@ -397,8 +448,39 @@ export default function StatsDashboard({ logbookId, logbookTitle }: StatsDashboa
                     />
                   </div>
 
+                  <div className="member-editor-card glass mt-6">
+                    <h3 className="stats-section-title">{t('stats.daily_motor_hours')}</h3>
+                    {accountStats.totals.fuelPerMotorHourL != null && (
+                      <p className="stats-section-sub">
+                        {t('stats.fuel_per_motor_hour')}: {formatFuelPerMotorHour(accountStats.totals.fuelPerMotorHourL)} {t('stats.unit_l')}/{t('stats.unit_h')}
+                      </p>
+                    )}
+                    <DailyBarChart
+                      days={allAccountDays}
+                      valueFn={(d) => d.motorHours}
+                      barClass="stats-bar--motor-hours"
+                      formatValue={formatHours}
+                    />
+                    {allAccountDays.some((d) => d.fuelPerMotorHourL != null) && (
+                      <>
+                        <h4 className="stats-section-subtitle mt-4">{t('stats.daily_fuel_per_motor_hour')}</h4>
+                        <DailyBarChart
+                          days={allAccountDays}
+                          valueFn={(d) => d.fuelPerMotorHourL ?? 0}
+                          barClass="stats-bar--fuel-per-hour"
+                          formatValue={(v) => formatFuelPerMotorHour(v > 0 ? v : null)}
+                        />
+                      </>
+                    )}
+                  </div>
+
                   <div className="member-editor-card glass mt-6">
                     <h3 className="stats-section-title">{t('stats.daily_consumption')}</h3>
+                    {accountStats.totals.fuelPerMotorHourL != null && (
+                      <p className="stats-section-sub">
+                        {t('stats.fuel_per_motor_hour')}: {formatFuelPerMotorHour(accountStats.totals.fuelPerMotorHourL)} {t('stats.unit_l')}/{t('stats.unit_h')}
+                      </p>
+                    )}
                     <ConsumptionChart days={allAccountDays} />
                   </div>
 

client/src/context/UnsavedChangesContext.tsx

@@ -0,0 +1,77 @@
+import {
+  createContext,
+  useContext,
+  useCallback,
+  useEffect,
+  useRef,
+  useMemo,
+  type ReactNode
+} from 'react'
+import { useTranslation } from 'react-i18next'
+import { useDialog } from '../components/ModalDialog.tsx'
+
+interface UnsavedChangesContextValue {
+  setDirty: (source: string, dirty: boolean) => void
+  confirmLeave: () => Promise<boolean>
+}
+
+const UnsavedChangesContext = createContext<UnsavedChangesContextValue | null>(null)
+
+export function UnsavedChangesProvider({ children }: { children: ReactNode }) {
+  const { t } = useTranslation()
+  const { showConfirm } = useDialog()
+  const dirtySources = useRef(new Set<string>())
+
+  const setDirty = useCallback((source: string, dirty: boolean) => {
+    if (dirty) dirtySources.current.add(source)
+    else dirtySources.current.delete(source)
+  }, [])
+
+  const confirmLeave = useCallback(async (): Promise<boolean> => {
+    if (dirtySources.current.size === 0) return true
+    return showConfirm(
+      t('common.unsaved_changes_message'),
+      t('common.unsaved_changes_title'),
+      t('common.unsaved_changes_leave'),
+      t('common.unsaved_changes_stay')
+    )
+  }, [showConfirm, t])
+
+  useEffect(() => {
+    const handler = (e: BeforeUnloadEvent) => {
+      if (dirtySources.current.size === 0) return
+      e.preventDefault()
+      e.returnValue = ''
+    }
+    window.addEventListener('beforeunload', handler)
+    return () => window.removeEventListener('beforeunload', handler)
+  }, [])
+
+  const value = useMemo(() => ({ setDirty, confirmLeave }), [setDirty, confirmLeave])
+
+  return (
+    <UnsavedChangesContext.Provider value={value}>
+      {children}
+    </UnsavedChangesContext.Provider>
+  )
+}
+
+export function useUnsavedChangesContext(): UnsavedChangesContextValue {
+  const ctx = useContext(UnsavedChangesContext)
+  if (!ctx) {
+    throw new Error('useUnsavedChangesContext must be used within UnsavedChangesProvider')
+  }
+  return ctx
+}
+
+/** Register a form/view as having unsaved changes (cleared automatically on unmount). */
+export function useRegisterUnsavedChanges(source: string, isDirty: boolean) {
+  const { setDirty, confirmLeave } = useUnsavedChangesContext()
+
+  useEffect(() => {
+    setDirty(source, isDirty)
+    return () => setDirty(source, false)
+  }, [source, isDirty, setDirty])
+
+  return { confirmLeave }
+}

client/src/i18n/locales/de.json

@@ -2,7 +2,15 @@
   "translation": {
     "app": {
       "name": "Kapteins Daagbok",
-      "tagline": "Privates Yacht-Logbuch"
+      "tagline": "Privates Yacht-Logbuch",
+      "beta": "Beta",
+      "beta_hint": "Beta-Version — Funktionen können sich noch ändern"
+    },
+    "common": {
+      "unsaved_changes_title": "Ungespeicherte Änderungen",
+      "unsaved_changes_message": "Du hast ungespeicherte Änderungen. Möchtest du die Seite wirklich verlassen? Deine Änderungen gehen verloren.",
+      "unsaved_changes_leave": "Verlassen",
+      "unsaved_changes_stay": "Bleiben"
     },
     "nav": {
       "dashboard": "Dashboard",
@@ -143,6 +151,7 @@
       "sign_passkey_signing": "Passkey wird angefordert…",
       "sign_passkey_signed": "Freigegeben von {{username}}",
       "sign_passkey_export": "Passkey: {{username}} ({{date}})",
+      "sign_attribution_export": "{{username}} ({{date}})",
       "sign_passkey_clear": "Passkey-Freigabe entfernen",
       "sign_mode_passkey": "Passkey",
       "sign_mode_classic": "Klassisch",
@@ -196,6 +205,8 @@
       "event_heel": "Krängung (°)",
       "event_sails": "Segelführung / Motor",
       "motor_propulsion": "Maschinenfahrt",
+      "motor_hours": "Maschinenstunden (gesamt)",
+      "fuel_per_motor_hour": "Verbrauch pro Maschinenstunde",
       "event_distance": "Distanz (sm)",
       "export_csv": "CSV herunterladen",
       "share_csv": "CSV teilen",
@@ -263,6 +274,7 @@
     "crew": {
       "title": "Skipper- & Crew-Profile",
       "skipper_section": "Skipper-Profil",
+      "skipper_read_only_hint": "Das Skipper-Profil kann nur vom Logbuch-Eigner bearbeitet werden.",
       "crew_section": "Crew-Liste",
       "add_crew": "Crew-Mitglied hinzufügen",
       "edit_crew": "Crew-Mitglied bearbeiten",
@@ -469,6 +481,9 @@
       "travel_days": "Reisetage",
       "sail_distance": "Unter Segel",
       "motor_distance": "Maschinenfahrt",
+      "motor_hours_total": "Maschinenstunden gesamt",
+      "daily_motor_hours": "Maschinenstunden pro Reisetag",
+      "avg_motor_hours": "Ø Maschinenstunden pro Reisetag",
       "unknown_propulsion": "Unbekannt",
       "fuel_total": "Kraftstoff gesamt",
       "water_total": "Wasser gesamt",
@@ -482,9 +497,12 @@
       "avg_fuel": "Ø Kraftstoff",
       "avg_water": "Ø Wasser",
       "fuel_per_nm": "Kraftstoff pro sm",
+      "fuel_per_motor_hour": "Kraftstoff pro Maschinenstunde",
+      "daily_fuel_per_motor_hour": "Kraftstoffverbrauch pro Maschinenstunde je Reisetag",
       "fuel_legend": "Kraftstoff",
       "water_legend": "Wasser",
       "unit_nm": "sm",
+      "unit_h": "h",
       "unit_l": "L",
       "day_label": "Tag {{day}}",
       "account_logbooks": "Logbücher im Überblick",

client/src/i18n/locales/en.json

@@ -2,7 +2,15 @@
   "translation": {
     "app": {
       "name": "Kapteins Daagbok",
-      "tagline": "Private Yacht Logbook"
+      "tagline": "Private Yacht Logbook",
+      "beta": "Beta",
+      "beta_hint": "Beta release — features may still change"
+    },
+    "common": {
+      "unsaved_changes_title": "Unsaved changes",
+      "unsaved_changes_message": "You have unsaved changes. Leave this page anyway? Your changes will be lost.",
+      "unsaved_changes_leave": "Leave",
+      "unsaved_changes_stay": "Stay"
     },
     "nav": {
       "dashboard": "Dashboard",
@@ -143,6 +151,7 @@
       "sign_passkey_signing": "Requesting Passkey…",
       "sign_passkey_signed": "Signed by {{username}}",
       "sign_passkey_export": "Passkey: {{username}} ({{date}})",
+      "sign_attribution_export": "{{username}} ({{date}})",
       "sign_passkey_clear": "Remove Passkey signature",
       "sign_mode_passkey": "Passkey",
       "sign_mode_classic": "Classic",
@@ -196,6 +205,8 @@
       "event_heel": "Heel Angle (°)",
       "event_sails": "Sails / Motor Status",
       "motor_propulsion": "Engine Propulsion",
+      "motor_hours": "Engine hours (total)",
+      "fuel_per_motor_hour": "Consumption per engine hour",
       "event_distance": "Distance (nm)",
       "export_csv": "Download CSV",
       "share_csv": "Share CSV",
@@ -263,6 +274,7 @@
     "crew": {
       "title": "Skipper & Crew Profiles",
       "skipper_section": "Skipper Profile",
+      "skipper_read_only_hint": "The skipper profile can only be edited by the logbook owner.",
       "crew_section": "Crew List",
       "add_crew": "Add Crew Member",
       "edit_crew": "Edit Crew Member",
@@ -469,6 +481,9 @@
       "travel_days": "Travel days",
       "sail_distance": "Under sail",
       "motor_distance": "Engine",
+      "motor_hours_total": "Total engine hours",
+      "daily_motor_hours": "Engine hours per travel day",
+      "avg_motor_hours": "Avg. engine hours per travel day",
       "unknown_propulsion": "Unknown",
       "fuel_total": "Total fuel",
       "water_total": "Total water",
@@ -482,9 +497,12 @@
       "avg_fuel": "Avg. fuel",
       "avg_water": "Avg. water",
       "fuel_per_nm": "Fuel per nm",
+      "fuel_per_motor_hour": "Fuel per engine hour",
+      "daily_fuel_per_motor_hour": "Fuel consumption per engine hour by travel day",
       "fuel_legend": "Fuel",
       "water_legend": "Water",
       "unit_nm": "nm",
+      "unit_h": "h",
       "unit_l": "L",
       "day_label": "Day {{day}}",
       "account_logbooks": "Logbooks overview",

client/src/services/analytics.ts

@@ -14,6 +14,8 @@ export const PlausibleEvents = {
   ONBOARDING_TOUR_SKIPPED: 'Onboarding Tour Skipped',
   INVITE_GENERATED: 'Invite Generated',
   INVITE_ACCEPTED: 'Invite Accepted',
+  LOGBOOK_SHARED: 'Logbook Shared',
+  PUBLIC_LINK_OPENED: 'Public Link Opened',
   PDF_EXPORTED: 'PDF Exported',
   CSV_EXPORTED: 'CSV Exported',
   CSV_SHARED: 'CSV Shared',

client/src/services/csvExport.ts

@@ -3,6 +3,7 @@ import { getActiveMasterKey } from './auth.js'
 import { getLogbookKey } from './logbookKeys.js'
 import { decryptJson } from './crypto.js'
 import { formatSignatureForExport, normalizeSignature } from '../utils/signatures.js'
+import { sortLogEventsByTime } from '../utils/logEntryPayload.js'
 import i18n from '../i18n/index.js'
 
 function escapeCsvValue(val: string | number | undefined | null): string {
@@ -79,7 +80,7 @@ export async function exportLogbookToCsv(logbookId: string, preloadedData?: { ya
   const headers = [
     'Date', 'Day of Travel', 'Departure Port', 'Destination Port',
     'Skipper Signature', 'Crew Signature',
-    'Track Distance (nm)', 'Track Max Speed (kn)', 'Track Avg Speed (kn)',
+    'Track Distance (nm)', 'Track Max Speed (kn)', 'Track Avg Speed (kn)', 'Motor Hours (h)',
     'Event Time', 'MgK Course', 'RwK Course',
     'Wind Dir', 'Wind Str', 'Barometer (hPa)', 'Sea State',
     'Current', 'Heel Angle', 'Sails/Motor', 'Log (nm)', 'Distance (nm)',
@@ -95,6 +96,10 @@ export async function exportLogbookToCsv(logbookId: string, preloadedData?: { ya
     passkeyLabel: (username: string, signedAt: string) => {
       const date = new Date(signedAt).toLocaleString(i18n.language === 'de' ? 'de-DE' : 'en-GB')
       return i18n.t('logs.sign_passkey_export', { username, date })
+    },
+    attributionLabel: (username: string, signedAt: string) => {
+      const date = new Date(signedAt).toLocaleString(i18n.language === 'de' ? 'de-DE' : 'en-GB')
+      return i18n.t('logs.sign_attribution_export', { username, date })
     }
   };
 
@@ -108,6 +113,7 @@ export async function exportLogbookToCsv(logbookId: string, preloadedData?: { ya
     const trackDist = entry.trackDistanceNm ?? '';
     const trackMax = entry.trackSpeedMaxKn ?? '';
     const trackAvg = entry.trackSpeedAvgKn ?? '';
+    const motorH = entry.motorHours ?? '';
     const fwM = entry.freshwater?.morning ?? '';
     const fwR = entry.freshwater?.refilled ?? '';
     const fwE = entry.freshwater?.evening ?? '';
@@ -123,7 +129,7 @@ export async function exportLogbookToCsv(logbookId: string, preloadedData?: { ya
       rows.push([
         dateVal, travelDay, dep, dest,
         signS, signC,
-        trackDist, trackMax, trackAvg,
+        trackDist, trackMax, trackAvg, motorH,
         '', '', '',
         '', '', '', '',
         '', '', '', '', '',
@@ -134,12 +140,12 @@ export async function exportLogbookToCsv(logbookId: string, preloadedData?: { ya
       ].map(escapeCsvValue));
     } else {
       // Sort events chronologically by time
-      const sortedEvents = [...eventsList].sort((a, b) => (a.time || '').localeCompare(b.time || ''));
+      const sortedEvents = sortLogEventsByTime(eventsList);
       for (const ev of sortedEvents) {
         rows.push([
           dateVal, travelDay, dep, dest,
           signS, signC,
-          trackDist, trackMax, trackAvg,
+          trackDist, trackMax, trackAvg, motorH,
           ev.time || '', ev.mgk || '', ev.rwk || '',
           ev.windDirection || '', ev.windStrength || '', ev.windPressure || '', ev.seaState || '',
           ev.current || '', ev.heel || '', ev.sailsOrMotor || '', ev.logReading || '', ev.distance || '',

client/src/services/demoLogbookData.ts

@@ -26,6 +26,7 @@ export interface DemoDaySpec {
   filename: string
   freshwater: { morning: number; refilled: number; evening: number; consumption: number }
   fuel: { morning: number; refilled: number; evening: number; consumption: number }
+  motorHours?: number
   events: Array<Record<string, string>>
 }
 
@@ -100,6 +101,7 @@ export function buildDemoDays(): DemoDaySpec[] {
       filename: 'laboe-damp.gpx',
       freshwater: { morning: 105, refilled: 25, evening: 110, consumption: 20 },
       fuel: { morning: 78, refilled: 0, evening: 70, consumption: 8 },
+      motorHours: 1.5,
       events: [
         {
           time: '09:00',
@@ -247,6 +249,9 @@ export function buildPublicDemoFixture(): PublicDemoFixture {
       entryPayload.trackSpeedMaxKn = stats.speedMaxKn
       entryPayload.trackSpeedAvgKn = stats.speedAvgKn
     }
+    if (day.motorHours != null && day.motorHours > 0) {
+      entryPayload.motorHours = day.motorHours
+    }
 
     entries.push(entryPayload as PublicDemoFixture['entries'][number])
 
@@ -303,6 +308,9 @@ export function buildDemoEntryPayloads(): Array<{
       entryPayload.trackSpeedMaxKn = stats.speedMaxKn
       entryPayload.trackSpeedAvgKn = stats.speedAvgKn
     }
+    if (day.motorHours != null && day.motorHours > 0) {
+      entryPayload.motorHours = day.motorHours
+    }
 
     return {
       entryId,

client/src/services/pdfExport.ts

@@ -3,7 +3,8 @@ import { db } from './db.js'
 import { getActiveMasterKey } from './auth.js'
 import { getLogbookKey } from './logbookKeys.js'
 import { decryptJson } from './crypto.js'
-import { isSignatureImage, isPasskeySignature } from '../utils/signatures.js'
+import { isSignatureImage, isPasskeySignature, isClassicSignature, getSignaturePayload } from '../utils/signatures.js'
+import { sortLogEventsByTime } from '../utils/logEntryPayload.js'
 import i18n from '../i18n/index.js'
 
 function formatPasskeySignDate(signedAt: string): string {
@@ -132,7 +133,7 @@ export async function generateLogbookPagePdf(logbookId: string, entryId: string,
   // Draw Data Rows
   const events = entry.events || [];
   const maxRows = 16;
-  const sortedEvents = [...events].sort((a: any, b: any) => (a.time || '').localeCompare(b.time || ''));
+  const sortedEvents = sortLogEventsByTime(events);
 
   doc.setFont('Helvetica', 'normal');
 
@@ -255,8 +256,16 @@ export async function generateLogbookPagePdf(logbookId: string, entryId: string,
     const crewDate = formatPasskeySignDate(entry.signCrew.signedAt);
     doc.text(`Passkey: ${entry.signCrew.username}`, sigX + 80.5, sigY + 9);
     doc.text(crewDate, sigX + 80.5, sigY + 13.5);
-  } else if (isSignatureImage(entry.signCrew)) {
+  } else if (isClassicSignature(entry.signCrew)) {
-    doc.addImage(entry.signCrew, 'PNG', sigX + 80.5, sigY + 6, 72, 14)
+    doc.setFont('Helvetica', 'normal');
+    const crewDate = formatPasskeySignDate(entry.signCrew.signedAt);
+    doc.text(entry.signCrew.username, sigX + 80.5, sigY + 9);
+    doc.text(crewDate, sigX + 80.5, sigY + 13.5);
+    if (isSignatureImage(entry.signCrew.payload)) {
+      doc.addImage(entry.signCrew.payload, 'PNG', sigX + 80.5, sigY + 6, 72, 14)
+    }
+  } else if (isSignatureImage(getSignaturePayload(entry.signCrew))) {
+    doc.addImage(getSignaturePayload(entry.signCrew), 'PNG', sigX + 80.5, sigY + 6, 72, 14)
   } else {
     doc.setFont('Helvetica', 'normal');
     doc.text(String(entry.signCrew || '—').toUpperCase(), sigX + 80.5, sigY + 11.2);

client/src/services/statsAggregation.ts

@@ -10,6 +10,7 @@ import {
   parseEventDistanceNm,
   splitDistanceByPropulsion
 } from '../utils/propulsionStats.js'
+import { computeFuelPerMotorHour } from '../utils/fuelStats.js'
 
 export type DistanceSource = 'gps' | 'events' | 'none'
 
@@ -27,6 +28,8 @@ export interface TravelDayStats {
   sailDistanceNm: number
   motorDistanceNm: number
   unknownPropulsionNm: number
+  motorHours: number
+  fuelPerMotorHourL: number | null
   hasGpsTrack: boolean
 }
 
@@ -59,12 +62,15 @@ export interface StatsTotals {
   sailDistanceNm: number
   motorDistanceNm: number
   unknownPropulsionNm: number
+  totalMotorHours: number
   totalFuelL: number
   totalFreshwaterL: number
   avgDistancePerDayNm: number
+  avgMotorHoursPerDay: number
   avgFuelPerDayL: number
   avgFreshwaterPerDayL: number
   fuelPerNmL: number | null
+  fuelPerMotorHourL: number | null
 }
 
 const TRACK_COLORS = [
@@ -102,6 +108,7 @@ function buildTotals(days: TravelDayStats[]): StatsTotals {
   const sailDistanceNm = days.reduce((sum, d) => sum + d.sailDistanceNm, 0)
   const motorDistanceNm = days.reduce((sum, d) => sum + d.motorDistanceNm, 0)
   const unknownPropulsionNm = days.reduce((sum, d) => sum + d.unknownPropulsionNm, 0)
+  const totalMotorHours = days.reduce((sum, d) => sum + d.motorHours, 0)
   const totalFuelL = days.reduce((sum, d) => sum + d.fuelConsumptionL, 0)
   const totalFreshwaterL = days.reduce((sum, d) => sum + d.freshwaterConsumptionL, 0)
 
@@ -112,10 +119,13 @@ function buildTotals(days: TravelDayStats[]): StatsTotals {
     sailDistanceNm: Number(sailDistanceNm.toFixed(2)),
     motorDistanceNm: Number(motorDistanceNm.toFixed(2)),
     unknownPropulsionNm: Number(unknownPropulsionNm.toFixed(2)),
+    totalMotorHours: Number(totalMotorHours.toFixed(1)),
     totalFuelL: Number(totalFuelL.toFixed(1)),
     totalFreshwaterL: Number(totalFreshwaterL.toFixed(1)),
     avgDistancePerDayNm:
       travelDayCount > 0 ? Number((totalDistanceNm / travelDayCount).toFixed(2)) : 0,
+    avgMotorHoursPerDay:
+      travelDayCount > 0 ? Number((totalMotorHours / travelDayCount).toFixed(1)) : 0,
     avgFuelPerDayL:
       travelDayCount > 0 ? Number((totalFuelL / travelDayCount).toFixed(1)) : 0,
     avgFreshwaterPerDayL:
@@ -123,7 +133,8 @@ function buildTotals(days: TravelDayStats[]): StatsTotals {
     fuelPerNmL:
       totalDistanceNm > 0 && totalFuelL > 0
         ? Number((totalFuelL / totalDistanceNm).toFixed(2))
-        : null
+        : null,
+    fuelPerMotorHourL: computeFuelPerMotorHour(totalFuelL, totalMotorHours)
   }
 }
 
@@ -180,6 +191,9 @@ async function loadTravelDaysForLogbook(
       hasGpsTrack = !!(await db.gpsTracks.get(entry.payloadId))
     }
 
+    const fuelConsumptionL = Number(payload.fuel?.consumption) || 0
+    const motorHours = Number(payload.motorHours) || 0
+
     days.push({
       entryId: entry.payloadId,
       logbookId,
@@ -189,11 +203,13 @@ async function loadTravelDaysForLogbook(
       destination: payload.destination || '',
       distanceNm,
       distanceSource,
-      fuelConsumptionL: Number(payload.fuel?.consumption) || 0,
+      fuelConsumptionL,
       freshwaterConsumptionL: Number(payload.freshwater?.consumption) || 0,
       sailDistanceNm: propulsion.sailDistanceNm,
       motorDistanceNm: propulsion.motorDistanceNm,
       unknownPropulsionNm: propulsion.unknownPropulsionNm,
+      motorHours,
+      fuelPerMotorHourL: computeFuelPerMotorHour(fuelConsumptionL, motorHours),
       hasGpsTrack
     })
   }
@@ -249,3 +265,7 @@ export function formatNm(value: number): string {
 export function formatLiters(value: number): string {
   return Number.isInteger(value) ? String(value) : value.toFixed(1)
 }
+
+export function formatHours(value: number): string {
+  return Number.isInteger(value) ? String(value) : value.toFixed(1)
+}

client/src/types/signatures.ts

@@ -11,5 +11,16 @@ export interface PasskeySignature {
   clientVerified: boolean
 }
 
-/** Legacy: PNG data URL oder getippter Name */
+/** Klassische Unterschrift mit Benutzer-Zuordnung (Crew) */
-export type SignatureValue = string | PasskeySignature
+export interface ClassicSignature {
+  kind: 'classic'
+  version: 1
+  role: 'skipper' | 'crew'
+  userId: string
+  username: string
+  signedAt: string
+  payload: string
+}
+
+/** Legacy: PNG data URL oder getippter Name; oder strukturierte Signaturen */
+export type SignatureValue = string | PasskeySignature | ClassicSignature

client/src/utils/fuelStats.ts

@@ -0,0 +1,13 @@
+/** Liters per motor hour from daily fuel consumption and motor hours. */
+export function computeFuelPerMotorHour(
+  fuelConsumptionL: number,
+  motorHours: number
+): number | null {
+  if (motorHours <= 0) return null
+  return Number((fuelConsumptionL / motorHours).toFixed(2))
+}
+
+export function formatFuelPerMotorHour(value: number | null | undefined): string {
+  if (value == null) return '—'
+  return Number.isInteger(value) ? String(value) : value.toFixed(2)
+}

client/src/utils/logEntryPayload.ts

@@ -17,6 +17,50 @@ export interface LogEventPayload {
   remarks: string
 }
 
+const LOG_EVENT_FIELDS: (keyof LogEventPayload)[] = [
+  'time', 'mgk', 'rwk', 'windPressure', 'windDirection', 'windStrength', 'seaState',
+  'weatherIcon', 'current', 'heel', 'sailsOrMotor', 'logReading', 'distance',
+  'gpsLat', 'gpsLng', 'remarks'
+]
+
+/** Normalize partial/legacy events so all fields are strings (safe for form + save). */
+export function normalizeLogEvent(event: Partial<LogEventPayload> | Record<string, unknown>): LogEventPayload {
+  const e = event as Record<string, unknown>
+  const timeRaw = String(e.time ?? '').trim()
+  const normalized: LogEventPayload = {
+    time: timeRaw.length >= 5 ? timeRaw.slice(0, 5) : timeRaw,
+    mgk: '',
+    rwk: '',
+    windPressure: '',
+    windDirection: '',
+    windStrength: '',
+    seaState: '',
+    weatherIcon: '',
+    current: '',
+    heel: '',
+    sailsOrMotor: '',
+    logReading: '',
+    distance: '',
+    gpsLat: '',
+    gpsLng: '',
+    remarks: ''
+  }
+  for (const key of LOG_EVENT_FIELDS) {
+    if (key === 'time') continue
+    normalized[key] = String(e[key] ?? '').trim()
+  }
+  return normalized
+}
+
+export function logEventsEqual(a: LogEventPayload, b: LogEventPayload): boolean {
+  return LOG_EVENT_FIELDS.every((key) => a[key] === b[key])
+}
+
+/** Chronological order: earliest time first (HH:MM). */
+export function sortLogEventsByTime<T extends LogEventPayload>(events: T[]): T[] {
+  return [...events].sort((a, b) => (a.time || '').localeCompare(b.time || ''))
+}
+
 export interface LogEntryPayloadInput {
   date: string
   dayOfTravel: string
@@ -27,6 +71,7 @@ export interface LogEntryPayloadInput {
   trackDistanceNm?: number
   trackSpeedMaxKn?: number
   trackSpeedAvgKn?: number
+  motorHours?: number
   events: LogEventPayload[]
 }
 
@@ -38,12 +83,15 @@ export function buildLogEntryPayload(input: LogEntryPayloadInput): Record<string
     destination: input.destination.trim(),
     freshwater: { ...input.freshwater },
     fuel: { ...input.fuel },
-    events: input.events.map((e) => ({ ...e }))
+    events: sortLogEventsByTime(input.events.map((e) => normalizeLogEvent(e)))
   }
 
   if (input.trackDistanceNm !== undefined) payload.trackDistanceNm = input.trackDistanceNm
   if (input.trackSpeedMaxKn !== undefined) payload.trackSpeedMaxKn = input.trackSpeedMaxKn
   if (input.trackSpeedAvgKn !== undefined) payload.trackSpeedAvgKn = input.trackSpeedAvgKn
+  if (input.motorHours !== undefined && input.motorHours > 0) {
+    payload.motorHours = Number(input.motorHours.toFixed(2))
+  }
 
   return payload
 }

client/src/utils/signatures.ts

@@ -1,8 +1,13 @@
 import { hashEntryForSigning } from './entryCanonicalHash.js'
-import type { PasskeySignature, SignatureValue } from '../types/signatures.js'
+import type { ClassicSignature, PasskeySignature, SignatureValue } from '../types/signatures.js'
 
 export type SkipperSignStatus = 'none' | 'valid' | 'invalid'
 
+export interface SignatureAttribution {
+  username: string
+  signedAt: string
+}
+
 export function isSignatureImage(value: string | undefined | null): boolean {
   return typeof value === 'string' && value.startsWith('data:image/')
 }
@@ -16,9 +21,52 @@ export function isPasskeySignature(value: unknown): value is PasskeySignature {
   )
 }
 
+export function isClassicSignature(value: unknown): value is ClassicSignature {
+  return (
+    typeof value === 'object' &&
+    value !== null &&
+    (value as ClassicSignature).kind === 'classic' &&
+    (value as ClassicSignature).version === 1
+  )
+}
+
+export function getSignaturePayload(value: SignatureValue | '' | undefined | null): string {
+  if (!value) return ''
+  if (isClassicSignature(value)) return value.payload
+  if (isPasskeySignature(value)) return ''
+  return value
+}
+
+export function getSignatureAttribution(value: SignatureValue | '' | undefined | null): SignatureAttribution | null {
+  if (!value || typeof value === 'string') return null
+  if (isPasskeySignature(value) || isClassicSignature(value)) {
+    return { username: value.username, signedAt: value.signedAt }
+  }
+  return null
+}
+
+export function createClassicSignature(input: {
+  role: 'skipper' | 'crew'
+  userId: string
+  username: string
+  signedAt: string
+  payload: string
+}): ClassicSignature {
+  return {
+    kind: 'classic',
+    version: 1,
+    role: input.role,
+    userId: input.userId,
+    username: input.username,
+    signedAt: input.signedAt,
+    payload: input.payload
+  }
+}
+
 export function normalizeSignature(value: unknown): SignatureValue | undefined {
   if (value === null || value === undefined || value === '') return undefined
   if (isPasskeySignature(value)) return value
+  if (isClassicSignature(value)) return value
   if (typeof value === 'string') return value
   return undefined
 }
@@ -47,6 +95,7 @@ export async function getSkipperSignStatus(
 export interface SignatureExportLabels {
   imagePlaceholder: string
   passkeyLabel: (username: string, signedAt: string) => string
+  attributionLabel: (username: string, signedAt: string) => string
 }
 
 export function formatSignatureForExport(
@@ -57,15 +106,19 @@ export function formatSignatureForExport(
   if (isPasskeySignature(value)) {
     return labels.passkeyLabel(value.username, value.signedAt)
   }
+  if (isClassicSignature(value)) {
+    return labels.attributionLabel(value.username, value.signedAt)
+  }
   if (isSignatureImage(value)) return labels.imagePlaceholder
   return value
 }
 
 export function serializeSignature(value: SignatureValue | '' | undefined): SignatureValue | undefined {
   if (!value) return undefined
-  if (isPasskeySignature(value)) return value
+  if (isPasskeySignature(value) || isClassicSignature(value)) return value
-  if (isSignatureImage(value)) return value
+  const payload = typeof value === 'string' ? value : getSignaturePayload(value)
-  const trimmed = value.trim()
+  if (isSignatureImage(payload)) return payload
+  const trimmed = payload.trim()
   return trimmed || undefined
 }
 

docs/marketing/beta-flyer.html

@@ -28,9 +28,11 @@
     .page {
       width: 210mm;
       height: 297mm;
-      padding: 14mm 16mm 12mm;
+      max-height: 297mm;
+      padding: 12mm 15mm 10mm;
       display: flex;
       flex-direction: column;
+      gap: 5mm;
       background:
         radial-gradient(ellipse 120% 80% at 100% 0%, rgba(56, 189, 248, 0.12) 0%, transparent 55%),
         radial-gradient(ellipse 90% 60% at 0% 100%, rgba(134, 59, 255, 0.14) 0%, transparent 50%),
@@ -52,20 +54,20 @@
       display: flex;
       align-items: center;
       gap: 5mm;
-      margin-bottom: 6mm;
+      flex-shrink: 0;
       position: relative;
       z-index: 1;
     }
 
     .logo {
-      width: 14mm;
+      width: 16mm;
-      height: 14mm;
+      height: 16mm;
       flex-shrink: 0;
       object-fit: contain;
     }
 
     .title-block h1 {
-      font-size: 22pt;
+      font-size: 23pt;
       font-weight: 700;
       letter-spacing: -0.02em;
       color: #f8fafc;
@@ -73,7 +75,7 @@
     }
 
     .title-block p {
-      font-size: 10.5pt;
+      font-size: 12pt;
       color: #94a3b8;
       margin-top: 1.5mm;
     }
@@ -83,19 +85,19 @@
       align-self: flex-start;
       background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
       color: #1e293b;
-      font-size: 9pt;
+      font-size: 11pt;
       font-weight: 800;
       letter-spacing: 0.12em;
-      padding: 2mm 4mm;
+      padding: 2.5mm 4.5mm;
       border-radius: 2mm;
       text-transform: uppercase;
     }
 
     .intro {
-      font-size: 10.5pt;
+      font-size: 12pt;
-      line-height: 1.55;
+      line-height: 1.5;
       color: #cbd5e1;
-      margin-bottom: 6mm;
+      flex-shrink: 0;
       max-width: 95%;
       position: relative;
       z-index: 1;
@@ -105,11 +107,48 @@
       color: #f8fafc;
     }
 
+    .screenshots {
+      display: grid;
+      grid-template-columns: repeat(3, 1fr);
+      gap: 3mm;
+      flex-shrink: 0;
+      position: relative;
+      z-index: 1;
+    }
+
+    .screenshot-card {
+      border-radius: 2.5mm;
+      overflow: hidden;
+      border: 1px solid rgba(148, 163, 184, 0.22);
+      background: rgba(15, 23, 42, 0.55);
+      display: flex;
+      flex-direction: column;
+      min-width: 0;
+    }
+
+    .screenshot-card img {
+      width: 100%;
+      height: 50mm;
+      object-fit: contain;
+      object-position: top center;
+      display: block;
+      background: #0b1220;
+    }
+
+    .screenshot-caption {
+      font-size: 9pt;
+      color: #94a3b8;
+      text-align: center;
+      padding: 1.5mm 2mm;
+      line-height: 1.3;
+      flex-shrink: 0;
+    }
+
     .features {
       display: grid;
       grid-template-columns: 1fr 1fr;
-      gap: 3mm 6mm;
+      gap: 2.5mm 6mm;
-      margin-bottom: 6mm;
+      flex-shrink: 0;
       position: relative;
       z-index: 1;
     }
@@ -118,7 +157,7 @@
       display: flex;
       gap: 2.5mm;
       align-items: flex-start;
-      font-size: 9.5pt;
+      font-size: 10.5pt;
       line-height: 1.4;
       color: #e2e8f0;
     }
@@ -136,20 +175,20 @@
       border-left: 3px solid #fbbf24;
       border-radius: 3mm;
       padding: 5mm 6mm;
-      margin-bottom: 6mm;
+      flex-shrink: 0;
       position: relative;
       z-index: 1;
     }
 
     .beta-box h2 {
-      font-size: 11pt;
+      font-size: 12.5pt;
       color: #fbbf24;
       margin-bottom: 2mm;
       font-weight: 700;
     }
 
     .beta-box p {
-      font-size: 9.5pt;
+      font-size: 10.5pt;
       line-height: 1.5;
       color: #cbd5e1;
     }
@@ -157,12 +196,12 @@
     .cta {
       display: flex;
       align-items: center;
-      gap: 8mm;
+      gap: 7mm;
       background: rgba(15, 23, 42, 0.6);
       border: 1px solid rgba(148, 163, 184, 0.2);
       border-radius: 4mm;
       padding: 5mm 6mm;
-      margin-bottom: auto;
+      flex-shrink: 0;
       position: relative;
       z-index: 1;
     }
@@ -183,16 +222,16 @@
     }
 
     .cta-text h3 {
-      font-size: 13pt;
+      font-size: 14.5pt;
       color: #38bdf8;
       font-weight: 700;
       margin-bottom: 2mm;
     }
 
     .cta-text p {
-      font-size: 9pt;
+      font-size: 11pt;
       color: #94a3b8;
-      line-height: 1.45;
+      line-height: 1.5;
     }
 
     .tags {
@@ -203,7 +242,7 @@
     }
 
     .tag {
-      font-size: 7.5pt;
+      font-size: 9.5pt;
       font-weight: 600;
       letter-spacing: 0.04em;
       text-transform: uppercase;
@@ -216,8 +255,9 @@
     footer {
       border-top: 1px solid rgba(148, 163, 184, 0.15);
       padding-top: 3mm;
-      margin-top: 5mm;
+      margin-top: auto;
-      font-size: 7.5pt;
+      flex-shrink: 0;
+      font-size: 9.5pt;
       line-height: 1.5;
       color: #64748b;
       position: relative;
@@ -242,20 +282,42 @@
     </header>
 
     <p class="intro">
-      Führe dein Bordlogbuch digital: Reisetage, GPS-Tracks, Crew und Schiffsdaten —
+      Führe dein Bordlogbuch digital: Reisetage, GPS-Tracks, Crew- und Schiffsdaten —
-      <strong>End-to-End-verschlüsselt</strong>, als App installierbar und
+      <strong>Ende-zu-Ende-verschlüsselt</strong>, als App installierbar und
       <strong>auch offline</strong> auf See nutzbar.
     </p>
 
     <section class="features" aria-label="Funktionen">
-      <div class="feature"><span class="feature-icon">✦</span><span>Reisetage im nautischen Logbuch-Format (Hafen, Wetter, Tankstände)</span></div>
+      <div class="feature"><span class="feature-icon">✦</span><span>Reisetage im nautischen Logbuch-Format (Hafen, Wetter, Besegelung, Crew, Tankstände)</span></div>
-      <div class="feature"><span class="feature-icon">✦</span><span>Offline-fähige PWA — installierbar auf Smartphone &amp; Tablet</span></div>
+      <div class="feature"><span class="feature-icon">✦</span><span>Offline-fähige PWA — läuft auf jedem Smartphone &amp; Tablet</span></div>
-      <div class="feature"><span class="feature-icon">✦</span><span>Passkey-Anmeldung &amp; clientseitige Verschlüsselung</span></div>
+      <div class="feature"><span class="feature-icon">✦</span><span>Einfache passwortlose Passkey-Anmeldung</span></div>
-      <div class="feature"><span class="feature-icon">✦</span><span>GPS-Tracks (GPX/KML), Karte &amp; Streckenstatistik</span></div>
+      <div class="feature"><span class="feature-icon">✦</span><span>Ende-zu-Ende Verschlüsselung</span></div>
+      <div class="feature"><span class="feature-icon">✦</span><span>GPS-Track Upload (GPX/KML) mit Kartendarstellung</span></div>
+      <div class="feature"><span class="feature-icon">✦</span><span>Streckenstatistik</span></div>
       <div class="feature"><span class="feature-icon">✦</span><span>Foto-Anhänge pro Reisetag</span></div>
+      <div class="feature"><span class="feature-icon">✦</span><span>Foto-Anhänge für Skipper und Crew</span></div>
       <div class="feature"><span class="feature-icon">✦</span><span>Crew einladen — gemeinsam am Logbuch arbeiten</span></div>
-      <div class="feature"><span class="feature-icon">✦</span><span>PDF- &amp; CSV-Export, verschlüsseltes Backup</span></div>
+      <div class="feature"><span class="feature-icon">✦</span><span>PDF- &amp; CSV-Export</span></div>
-      <div class="feature"><span class="feature-icon">✦</span><span>Mehrere Logbücher · Deutsch &amp; Englisch</span></div>
+      <div class="feature"><span class="feature-icon">✦</span><span>Verschlüsseltes Backup &amp; Wiederherstellung</span></div>
+      <div class="feature"><span class="feature-icon">✦</span><span>Logbuch mit Freunden teilen</span></div>
+      <div class="feature"><span class="feature-icon">✦</span><span>Beliebig viele Schiffe und Logbücher</span></div>
+      <div class="feature"><span class="feature-icon">✦</span><span>Deutsch &amp; Englisch</span></div>
+      <div class="feature"><span class="feature-icon">✦</span><span>Crafted in Kiel.Sailing.City.</span></div>
+    </section>
+
+    <section class="screenshots" aria-label="App-Screenshots">
+      <figure class="screenshot-card">
+        <img src="assets/screenshot-login.png" alt="Anmeldung mit Passkey und Demo" />
+        <figcaption class="screenshot-caption">Anmeldung &amp; Passkey</figcaption>
+      </figure>
+      <figure class="screenshot-card">
+        <img src="assets/screenshot-logbook.png" alt="Logbuch-Journal mit Reisetagen" />
+        <figcaption class="screenshot-caption">Logbuch-Journal</figcaption>
+      </figure>
+      <figure class="screenshot-card">
+        <img src="assets/screenshot-vessel.png" alt="Schiffs-Stammdaten mit Yachtfoto" />
+        <figcaption class="screenshot-caption">Schiffsdaten</figcaption>
+      </figure>
     </section>
 
     <section class="beta-box">

docs/plausible-events.md

@@ -29,6 +29,8 @@ Kapteins Daagbok nutzt [Plausible Analytics](https://plausible.io/) mit dem Scri
 | Demo Opened | Public-Demo unter `/demo` geöffnet (`DemoViewer.tsx`) | — |
 | Invite Generated | Einladungslink erzeugt (`SettingsForm.tsx`) | — |
 | Invite Accepted | Einladung angenommen und Logbuch beigetreten (`InvitationAcceptance.tsx`) | — |
+| Logbook Shared | Öffentlicher Freigabelink aktiviert (`SettingsForm.tsx`) | — |
+| Public Link Opened | Freigabelink unter `/share` erfolgreich geladen (`ReadOnlyViewer.tsx`) | — |
 | PDF Exported | PDF-Export eines Reisetags (`LogEntryEditor.tsx`, `LogEntriesList.tsx`) | `scope`: `entry` |
 | CSV Exported | CSV-Download aus der Eintragsliste (`LogEntriesList.tsx`) | — |
 | CSV Shared | CSV über Web Share API geteilt (`LogEntriesList.tsx`) | — |
@@ -52,8 +54,9 @@ Empfohlene Goal-Ketten für Auswertung:
 1. **Aktivierung:** Account Created → Logbook Created → Travel Day Created → Travel Day Saved
 2. **Onboarding:** Account Created → Onboarding Tour Completed (vs. Onboarding Tour Skipped)
 3. **Kollaboration:** Invite Generated → Invite Accepted
-4. **Export:** Travel Day Saved → PDF Exported / CSV Exported
+4. **Öffentliche Freigabe:** Logbook Shared → Public Link Opened
-5. **Datensicherung:** Backup Exported → Backup Restored
+5. **Export:** Travel Day Saved → PDF Exported / CSV Exported
+6. **Datensicherung:** Backup Exported → Backup Restored
 
 ## Entwicklung
 

server/src/routes/sign.ts

@@ -57,6 +57,13 @@ function hasWriteAccess(access: { isOwner: boolean; collaboration?: { role: stri
   return access.isOwner || access.collaboration?.role === 'WRITE'
 }
 
+async function hasWriteCollaborators(logbookId: string): Promise<boolean> {
+  const count = await prisma.collaboration.count({
+    where: { logbookId, role: 'WRITE' }
+  })
+  return count > 0
+}
+
 async function getAllowCredentialsForRole(
   logbookId: string,
   role: 'skipper' | 'crew',
@@ -79,7 +86,16 @@ async function getAllowCredentialsForRole(
   })
 
   const userIds = collaborations.map((c) => c.userId)
-  if (userIds.length === 0) return []
+  if (userIds.length === 0) {
+    const credentials = await prisma.credential.findMany({
+      where: { userId: requestingUserId }
+    })
+    return credentials.map((cred) => ({
+      id: Buffer.from(cred.credentialId, 'base64url'),
+      type: 'public-key' as const,
+      transports: cred.transports as any[]
+    }))
+  }
 
   const credentials = await prisma.credential.findMany({
     where: { userId: { in: userIds } }
@@ -99,14 +115,7 @@ async function isAuthorizedSigner(
   role: 'skipper' | 'crew'
 ): Promise<boolean> {
   if (role === 'skipper') {
-    // Skipper signing: owner or WRITE collaborator (design §2.1), using their own passkey.
+    return signerUserId === ownerUserId
-    if (signerUserId === ownerUserId) return true
-    const collaboration = await prisma.collaboration.findUnique({
-      where: {
-        logbookId_userId: { logbookId, userId: signerUserId }
-      }
-    })
-    return collaboration?.role === 'WRITE'
   }
 
   const collaboration = await prisma.collaboration.findUnique({
@@ -114,7 +123,13 @@ async function isAuthorizedSigner(
       logbookId_userId: { logbookId, userId: signerUserId }
     }
   })
-  return collaboration?.role === 'WRITE'
+  if (collaboration?.role === 'WRITE') return true
+
+  if (signerUserId === ownerUserId) {
+    return !(await hasWriteCollaborators(logbookId))
+  }
+
+  return false
 }
 
 router.post('/options', async (req: any, res) => {
@@ -138,6 +153,16 @@ router.post('/options', async (req: any, res) => {
       return res.status(403).json({ error: 'Forbidden: WRITE access required to sign entries' })
     }
 
+    const authorized = await isAuthorizedSigner(
+      logbookId,
+      access.logbook.userId,
+      req.userId,
+      role
+    )
+    if (!authorized) {
+      return res.status(403).json({ error: 'Forbidden: Signer not authorized for this role' })
+    }
+
     const allowCredentials = await getAllowCredentialsForRole(
       logbookId,
       role,
@@ -146,9 +171,7 @@ router.post('/options', async (req: any, res) => {
 
     if (allowCredentials.length === 0) {
       return res.status(400).json({
-        error: role === 'crew'
+        error: 'No passkey credentials found for signer'
-          ? 'No write collaborators with passkeys found'
-          : 'No passkey credentials found for signer'
       })
     }
 

server/src/routes/sync.ts

@@ -121,6 +121,17 @@ router.post('/push', async (req: any, res) => {
           continue
         }
 
+        if (!isOwner && (type === 'yacht' || (type === 'crew' && payloadId === 'skipper'))) {
+          results.push({
+            payloadId,
+            status: 'error',
+            error: type === 'yacht'
+              ? 'Forbidden: Only owner can modify vessel data'
+              : 'Forbidden: Only owner can modify skipper profile'
+          })
+          continue
+        }
+
         if (action === 'delete') {
           if (type === 'yacht') {
             await prisma.yachtPayload.deleteMany({ where: { logbookId } })